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Biotechnology ​

Biotechnology ​

Foundational Experiment: Cohen & Boyer (1972)
Cue WordsNotes
What is the significance of the Cohen & Boyer (1972) experiment and how was it conducted?
  • Significance: First instance of creating artificial recombinant DNA (rDNA), proving the Principle of Continuity of DNA across species.
    • Process: Isolated an antibiotic resistance gene from a plasmid of *Salmonella typhimurium* and linked it to a plasmid of *E. coli* using ligase.
India's Native CAR-T Solutions
Cue WordsNotes
Name India's first indigenous CAR-T solutions and their target indications.
  • NexCAR19: India's first indigenous CAR-T cell therapy for B-cell lymphomas and leukemia. Uses a humanized antibody to reduce immune rejection.
    • Qartemi: India's first globally benchmarked CAR-T treatment specifically designed for adult B-cell non-Hodgkin lymphoma.
How does in-body CAR T-cell reprogramming differ from conventional CAR-T therapy?
  • Conventional CAR-T: Extracts patient T-cells, genetically modifies them via viral vectors in a lab, then reinfuses after chemotherapy-based lymphodepletion; costly (₹60–70 lakh in India) and complex.
  • In-body reprogramming (NIAMS): Delivers mRNA via CD8-targeted lipid nanoparticles (CD8-tLNPs) — carrier "Lipid 829" — to engineer CAR T-cells directly inside the body, achieving B-cell depletion and tumour regression.
  • Advantages: no lab processing/viral vectors/chemotherapy; mRNA-based edits are temporary and safer, more scalable and cost-effective, with fewer liver/inflammatory side effects.

🎯 PYQs — Biotechnology (High Frequency)

Most Asked Topics:

  • CRISPR-Cas9 mechanism
  • GM crops in India (Bt Cotton, DMH-11)
  • Stem cell types and applications
  • Gene therapy and RNAi (RNA interference)
  • DNA profiling/fingerprinting

Common Traps:

  • ❌ Bt Brinjal is NOT commercially cultivated (under moratorium)
  • ❌ GM Mustard uses Barnase-Barstar, NOT Bt genes
  • ❌ CRISPR is gene editing, NOT particle physics

1. Basics of Molecular Biology ​

Gene, DNA, RNA
Cue WordsNotes
Compare Gene, DNA, RNA, Chromosomes, and Reverse Transcription.
  • Gene: Segment of DNA that codes for a specific protein (~19,000–25,000 in humans).
  • DNA (Deoxyribonucleic Acid): Double helix structure using four bases: Adenine (A), Thymine (T), Cytosine (C), and Guanine (G). Uses deoxyribose sugar.
  • RNA (Ribonucleic Acid): Typically single-stranded; uses Uracil (U) instead of Thymine. Uses ribose sugar.
  • Chromosome: Thread-like structure of DNA wrapped around Histone proteins; 46 in humans (23 pairs).
  • Reverse Transcription: Flow of genetic information from RNA $\rightarrow$ DNA (typical of retroviruses like HIV).
Central Dogma: Visualized
Types of RNA
Cue WordsNotes
Detail the specific functions of mRNA, tRNA, rRNA, siRNA, and miRNA.
  • mRNA (Messenger): Carries the genetic code from DNA in the nucleus to the ribosomes.
  • tRNA (Transfer): Brings amino acids to the ribosome during translation.
  • rRNA (Ribosomal): Forms the physical structure of the ribosome.
  • siRNA (Small Interfering): Triggers gene silencing via RNA interference (RNAi).
  • miRNA (MicroRNA): Small non-coding RNA that regulates post-transcriptional gene expression (Nobel Prize 2024).
Non-Coding & "Dark" DNA
Cue WordsNotes
What is non-coding DNA, and detail the T2T project and Tmesipteris oblanceolata.
  • Non-Coding DNA (Dark DNA): Genomic regions that do not code for proteins (approx. 98–99% of the human genome); crucial for gene regulation, controlling when and where genes are expressed.
    • T2T Project (Telomere-to-Telomere): Successfully sequenced the remaining 8% of the human genome (mostly heterochromatin/repetitive sequences) that the original HGP missed. Tmesipteris oblanceolata: A fork fern discovered to have the largest known genome (160 billion base pairs), approximately 50 times larger than the human genome.

2. Genome Sequencing & Bio-Governance ​

Major Genome Projects
Cue WordsNotes
Compare the HGP, T2T, Genome India, INDIgen, and Earth Bio-Genome projects.
  • Human Genome Project (HGP): 1990–2003; mapped 3.2 billion base pairs. Found only 1–2% of DNA codes for proteins.
  • T2T Project: Completed the sequencing of highly repetitive heterochromatin regions omitted by HGP.
  • Genome India Project (DBT): Sequenced 10,000 reference genomes from diverse Indian populations; stored at the Indian Biological Data Centre (IBDC) in Faridabad, accessible via the FeED data portal.
  • INDIgen Project (CSIR): Whole genome sequencing of 1,000+ Indian individuals for precision medicine.
  • Earth Bio-Genome Project: A global effort to sequence all 1.5 million known eukaryotic species.
India's Bio-Policies & Initiatives
Cue WordsNotes
Outline India's key biotechnology initiatives, policies, and portals (Biopharma SHAKTI, Bio-E3, PI-Check, SUJVIKA).
  • Biopharma SHAKTI Scheme (2026): Budget initiative with an outlay of ₹10,000 Crore over 5 years to scale biopharma manufacturing, biologics, and establish 1,000 accredited clinical trial sites.
  • Bio-E3 Policy (2024): High-performance biomanufacturing policy targeting a 300 Billion USD bioeconomy by 2030 (focusing on food, health, climate, and agriculture).
  • SUJVIKA Portal (2026): AI-driven Biotech Product Trade Intelligence tool to streamline R&D and trade insights.
  • Phenome India (PI-Check): CSIR health cohort database tracking health markers of 10,000 individuals to support precision medicine.
  • One Day One Genome: Daily release of annotated microbial genomes to catalog India's micro-biodiversity.
  • National Biofoundry Network: Established six automated biofoundries to design and optimize engineered organisms.
2024 BioE3 Policy — Cabinet Approval (24 Aug 2024)
Cue WordsNotes
When was the BioE3 Policy approved and by whom, and what is its core aim?
  • Cabinet approval: 24 August 2024, on the recommendation of the Department of Biotechnology.
  • Core aim: Fosters high-performance biomanufacturing via innovation-driven R&D support, establishing Biomanufacturing & Bio-AI hubs and Biofoundries (see "India's Bio-Policies & Initiatives" above for the National Biofoundry Network).
List the six strategic/thematic sectors of the BioE3 Policy.
  • High-value bio-based chemicals, biopolymers & enzymes
  • Smart proteins & functional foods
  • Precision biotherapeutics
  • Climate-resilient agriculture
  • Carbon capture & utilization
  • Marine and space research
How does BioE3 align with India's broader environmental goals?
  • Aligns with India's Net Zero carbon economy and "Lifestyle for Environment" (LiFE) initiatives; promotes a "Circular Bioeconomy" (cross-refer to the fuller "BioE3 Policy" Cornell blocks under Section 2 below for focus areas and strategic enablers).
Advanced 3D Bio-Modeling
Cue WordsNotes
Explain Organoids, Aphroids, Chimeroids, Organ-on-Chip, and Xenotransplantation.
  • Organoids: 3D structures grown from stem cells that mimic the organ's function (e.g., brain organoids).
  • Aphroids: 3D cell clusters designed to mimic tumor behavior for cancer research.
  • Chimeroids: Brain models built from stem cells of multiple individuals to study varying genetic drug responses.
  • Organ-on-Chip: Miniature devices mimicking blood flow and cellular environments to test drug toxicity.
  • Xenotransplantation: Transplantation of non-human tissues or organs (typically from genetically modified pigs) into humans.
Key Genomics Terminology
Cue WordsNotes
Define Transcriptome, Proteome, Metagenomics, and Aerial Metagenomics.
  • Transcriptome: The complete set of RNA molecules in a cell or tissue at a given time.
  • Proteome: The complete set of proteins expressed by a genome.
  • Metagenomics: The study of genetic material recovered directly from environmental samples (soil, water).
  • Aerial Metagenomics: The study of genetic material recovered from airborne particles or aerosols.

3. Genome Editing Technologies ​

CRISPR-Cas9 System
Cue WordsNotes
Explain the CRISPR-Cas9 components (gRNA, Cas9, PAM) and India's BIRSA-101 therapy.
    CRISPR-Cas9 Components:
  • Guide RNA (gRNA): Designed to match the target DNA sequence.
  • Cas9 Enzyme: Molecular scissors that bind to the gRNA and create a double-strand break using its HNH and RuvC domains.
  • PAM (Protospacer Adjacent Motif): A short DNA sequence (e.g., NGG) adjacent to the target site where Cas9 binds.
    • BIRSA-101: India's first indigenous CRISPR-based gene editing therapy for Sickle Cell Disease (SCD) using high-precision enFnCas9.
DNA Editing vs RNA Editing
Cue WordsNotes
Contrast DNA Editing (CRISPR-Cas9) and RNA Editing (ADAR/Cas13) in terms of permanence and safety.
  • DNA Editing (CRISPR-Cas9): Permanent genomic changes; higher risk of off-target mutations; potential immune reactions to bacterial Cas9.
    • RNA Editing (ADAR/Cas13): Temporary and reversible transcript modifications; lower safety risks as the ADAR enzyme is native to humans.
Other Genome Editing & SDN Categories
Cue WordsNotes
Detail ZFNs, TALENs, Base/Prime Editing, and the three SDN categories.
    Genome Editing Tools:
  • ZFNs (Zinc Finger Nucleases): Fusion of Zinc Finger DNA-binding proteins + FokI nuclease.
  • TALENs: Transcription Activator-Like Effector Nucleases; higher precision than ZFNs.
  • Base/Prime Editing: Swaps single nucleotides without making double-strand breaks.
    • Site-Directed Nucleases (SDN) Categories:
  • SDN-1: Small insertions/deletions without an external DNA template. Exempt from strict GMO rules in India.
  • SDN-2: Minor edits using a homologous repair template. Exempt from strict GMO rules in India.
  • SDN-3: Insertion of large foreign DNA. Governed as a Genetically Modified Organism (GMO); requires GEAC approval.
SDN Categories: Visualized
Gene Editing Tools & Clonal Tech in News
Cue WordsNotes
Explain ISDRA2TNPB, GlowCas9, SCNT, and Mitochondrial Replacement Therapy (MRT).
  • ISDRA2TNPB: Miniature plant genome-editing tool developed by ICAR using the TnpB protein.
  • GlowCas9: A bioluminescent Cas9 variant fused with deep-sea shrimp nano-luciferase, allowing real-time tracking of gene editing.
  • Somatic Cell Nuclear Transfer (SCNT): Transferring the nucleus of a somatic cell into an enucleated egg (e.g., Dolly the Sheep).
  • Mitochondrial Replacement Therapy (MRT): A three-parent baby technique to prevent inheritance of maternal mitochondrial diseases. Uses either Maternal Spindle Transfer (MST) or Pronuclear Transfer (PNT) to integrate donor mtDNA.

4. RNA Interference (RNAi) & Recombinant DNA (rDNA) ​

RNAi (Gene Silencing) Mechanism
Cue WordsNotes
Describe the biological mechanism and applications of RNA Interference (RNAi).
  • Mechanism:
    1. Dicer enzyme cuts double-stranded RNA (dsRNA) into siRNA (21-23 nucleotides).
    2. siRNA binds to the RISC (RNA-Induced Silencing Complex).
    3. The complex targets and cleaves complementary mRNA, preventing protein translation.
    Applications: Pest-resistant crops (e.g., tobacco resistant to *Meloidogyne incognita* nematode), cancer gene therapeutics.
Recombinant DNA (rDNA) Steps
Cue WordsNotes
Detail the step-by-step process of producing recombinant DNA.
  1. Isolation: Extract DNA using specific enzymes (Lysozyme for bacteria, Cellulase for plants, Chitinase for fungi).
  2. Cutting: Restriction enzymes (e.g., Hind II, EcoRI) cut DNA at specific palindromic sequences.
  3. Separation: Gel Electrophoresis separates DNA fragments on an Agarose gel (DNA moves toward the positive anode).
  4. Joining: DNA Ligase joins fragments.
  5. Insertion: Vector (plasmid) carries the DNA.
  6. Transformation: Introduced into competent host cells (e.g., E. coli treated with divalent calcium ions).
  7. Expression: Scaling up in Bioreactors, followed by Downstream Processing (separation and purification).
Methods of Gene Transfer
Cue WordsNotes
Compare Microinjection, Biolistics, Electroporation, and Agrobacterium tumefaciens gene transfer methods.
  • Microinjection: Direct injection into animal cell nuclei.
  • Biolistics (Gene Gun): High-velocity microprojectiles coated with DNA shot into plant cells.
  • Electroporation: Electrical pulses create transient pores in membranes.
  • Agrobacterium tumefaciens: Soil bacterium used as a natural vector for plant gene transfer.
PCR (Polymerase Chain Reaction)
Cue WordsNotes
Explain the three main steps of Polymerase Chain Reaction (PCR).
  1. Denaturation (95°C): Heat separates double-stranded DNA.
  2. Annealing (55°C): Primers bind to single-stranded templates.
  3. Extension (72°C): Taq Polymerase synthesizes new DNA strands.

5. Biotechnology Colors & Epigenetics ​

Biotechnology Color Spectrum
Cue WordsNotes
Classify biotechnology colors: Red, Green, Blue, White/Gray, Yellow, and Gold.
  • Red: Medical/Pharmaceutical (Vaccines, Antibiotics).
  • Green: Agriculture (GM crops, bio-fertilizers).
  • Blue: Marine/Aquatic resources.
  • White/Gray: Industrial processes (enzymes, bio-fuels).
  • Yellow: Food biotechnology (fermentation).
  • Gold: Bioinformatics, nanobiotechnology, and computational biology.
Mycorrhizal & Epigenetic Biotechnology
Cue WordsNotes
Explain mycorrhizal biotechnology, epigenome editing, and the DEEP project.
  • Mycorrhizal Biotechnology: Mass production of mycorrhizal fungi to enhance soil phosphorus uptake and crop health.
    • Epigenome Editing: Adjusting gene expression (via DNA methylation or histone acetylation) without altering the underlying genetic sequence. DEEP Project (Diverse Epigenetic Epidemiology Partnership): CSIR-CCMB and University of Bristol collaboration studying epigenetic factors in global disease risks.

6. Applications in Agriculture & Medicine ​

Genetically Modified (GM) Crops
Cue WordsNotes
Analyze key GM crops in India (Bt Cotton, Bt Brinjal, Golden Rice, DMH-11 Mustard) and their concerns.
  • Bt Cotton: Expresses Cry1Ac/Cry2Ab genes from *Bacillus thuringiensis* targeting bollworms. The only commercially cultivated GM crop in India.
  • Bt Brinjal: Approved by GEAC but currently under an indefinite commercial moratorium.
  • Golden Rice: Fortified with beta-carotene (Vitamin A precursor); not approved in India.
  • DMH-11 Mustard: Uses the Barnase-Barstar gene system for hybridization. Approved for environmental release in 2022; developed by Delhi University; exhibits herbicide (Basta) tolerance.
  • Concerns: Development of "superweeds" via herbicide resistance, gene escape via wild cross-pollination, and corporate monopoly of seeds.
Nano-Biotech in Agriculture
Cue WordsNotes
Explain Nano Urea/DAP, Nano Sulphur, biostimulants, and Kamla genome-edited rice.
  • Nano Urea & Nano DAP: Developed by IFFCO; uses particles < 100nm to achieve 90% nutrient utilization efficiency, cutting fertilizer run-off.
  • Nano Sulphur (TERI): Biologically synthesized using bacteria; boosts mustard yields and serves as an antibacterial agent.
  • Biostimulants: Natural plant growth stimulators. Regulated under the Fertiliser (Control) Order, 1985. Animal-sourced approvals were withdrawn in 2025.
  • Genome-Edited Rice: ICAR developed DRR Dhan 100 (Kamla) and Pusa DST Rice 1 by knocking out the cell division-inhibiting CKX2 gene to boost yields.
GMO Regulatory Bodies in India
Cue WordsNotes
Name the five regulatory bodies for GMOs in India and their specific roles.
  • RDAC (Recombinant DNA Advisory Committee): Advisory role.
  • IBSC (Institutional Biosafety Committee): On-site safety monitor.
  • RCGM (Review Committee on Genetic Manipulation): DBT body; regulates research and trials.
  • GEAC (Genetic Engineering Appraisal Committee): MoEFCC body; statutory authority giving final approvals for environmental release of GMOs.
  • SBCC (State Biotechnology Coordination Committee): State-level monitoring.
GMO Governance: Visualized
Genetic Engineering vs Genetic Modification
Cue WordsNotes
Distinguish Genetic Engineering from Genetic Modification, and define a GMO/LMO.
  • Genetic Modification (broad): Any change to an organism's genetic makeup, including traditional methods like selective breeding and hybridization (no direct DNA manipulation required).
    • Genetic Engineering (narrow): A subset of genetic modification involving direct, deliberate manipulation of an organism's DNA in a laboratory using biotechnology tools (restriction enzymes, vectors, CRISPR) — typically to insert, delete, or edit specific genes, often across species. GMO (Genetically Modified Organism): An organism whose genetic material has been altered using genetic engineering techniques in a way that does not occur naturally. LMO (Living Modified Organism): Cartagena Protocol terminology for a GMO capable of transferring or replicating genetic material (used in India's biosafety/trans-boundary movement rules under the EPA, 1986 Rules).
Advanced Medicine & Stem Cells
Cue WordsNotes
Explain gene therapy, stem cell potency levels, stem cell banking, and Monoclonal Antibodies.
    Gene Therapy: Correcting defective genes (e.g.,SCID treated by inserting functional ADA cDNA into patient lymphocytes). Stem Cell Potency:
  • Totipotent: Can form all cell types + placenta (Zygote).
  • Pluripotent: Can form all body cell types except placenta (Embryonic Stem Cells).
  • Multipotent: Can form limited related lineages (Bone marrow HSCs).
  • iPSCs (Induced Pluripotent Stem Cells): Somatic cells reprogrammed to pluripotency using 4 Yamanaka transcription factors.
    • Stem Cell Banking: Storing cord blood or tissue in liquid nitrogen at -170°C. India's first livestock stem cell biobank established at NIAB Hyderabad. Monoclonal Antibodies (mAbs): Laboratory-produced antibodies cloned from a single parent cell using hybridoma technology. E.g., Rituximab (lymphoma), Tocilizumab (anti-inflammatory).

7. Environmental & Forensic Biotech ​

Bioremediation Techniques
Cue WordsNotes
Compare Bioremediation, Phytoremediation, Oilzapper, and Biorock Technology.
  • Bioremediation: Using microbes to degrade contaminants.
  • Phytoremediation: Using plants to clean soils (phyto-degradation, phyto-volatilization).
  • Oilzapper: A bacterial consortium developed by TERI/ONGC to clean crude oil spills.
  • Biorock Technology: Electro-accumulation of minerals to restore coral reefs.
Forensic & Identification Tools
Cue WordsNotes
Contrast DNA Barcoding and DNA Fingerprinting.
  • DNA Barcoding: Identifying species using a short, standardized gene sequence (e.g., COI gene in animals, rbcL/matK in plants).
    • DNA Profiling (Fingerprinting): Analyzes highly variable Short Tandem Repeats (STRs) or microsatellite DNA to establish identity or parentage.
Compare STR, mtDNA, Y-chromosome, and SNP analysis for identifying degraded human remains.
    Mass-Disaster Victim Identification (e.g., Air India AI171):
  • STR analysis: Default method; needs non-degraded nuclear DNA; PCR amplifies STR regions, gel electrophoresis separates fragments into a matchable profile against first-degree relatives.
  • mtDNA analysis: Used when nuclear DNA is degraded, since mitochondrial DNA exists in many copies per cell and survives poorly-preserved/burnt remains better.
  • Y-chromosome analysis: Based on the sex-linked Y chromosome, useful for paternal-line identification.
  • SNP analysis: Used for highly degraded DNA; examines single-base variations, matched against reference samples like a toothbrush or hairbrush.

8. Clinical Trials & Recent Trends ​

Clinical Trials & CHIM
Cue WordsNotes
Outline the phases of Clinical Trials and explain the Controlled Human Infection Model (CHIM).
    Clinical Trial Phases:
  • Phase I: Safety and tolerability in healthy volunteers (5-50 subjects).
  • Phase II: Efficacy and dosage optimization (25-1000 subjects).
  • Phase III: Large-scale efficacy and safety confirmation (100-10,000 subjects).
  • Phase IV: Post-marketing surveillance.
    • CHIM (Controlled Human Infection Model): Intentionally exposing volunteers to pathogens to accelerate vaccine candidate testing.
Recent Biotechnology Innovations
Cue WordsNotes
Explain Gene Drive, Synthetic Biology, cfDNA, and ecDNA.
  • Gene Drive: Using CRISPR to skew inheritance patterns, ensuring a modified gene spreads through a population (e.g., malaria-resistant mosquitoes).
  • Synthetic Biology: Designing and engineering synthetic biological components and organisms from scratch.
  • cfDNA (Cell-free DNA): Circulating DNA fragments in blood plasma used for non-invasive prenatal testing (NIPT) and liquid cancer biopsies.
  • ecDNA (Extrachromosomal DNA): Circular DNA particles separate from chromosomes, frequently driving aggressive gene amplification in cancer.

I'll check existing Cornell Notes patterns in this project and scan for related biotech topics that may appear just outside the requested range.Checking for related SciTech Cornell conversions and fuller source notes on the listed biotech topics.Converting the Biotechnology section (lines 521–800) into zero-loss VitePress + Cornell Notes format. Space content (451–520) is out of scope.# Biotechnology & Genetic Engineering — Cornell Notes

Zero-loss conversion from NOTES_FILE.md (Biotechnology section ≈ lines 521–800). Topics named but not present as standalone detail in this range (NexCAR19 product specifics, DNA Barcoding, full Gene Editing vs Gene Therapy comparison, expanded DMH-11 dossier) are omitted rather than invented.

2. Biotechnology ​

About Biotechnology (UPSC 2018, 2019)
Cue WordsNotes
How does the UN CBD define Biotechnology?
  • Defined by UN CBD: Uses biological systems, organisms, or derivatives for products/processes.
What is India's global rank in biotechnology and USFDA-approved plants?
  • India's Rank: 12th globally; 2nd in USFDA-approved plants.
List the colour branches of Biotechnology.
  • Red — Vaccines & medicines
  • Green — Agriculture
  • White — Industrial
  • Blue — Marine applications
What are the main segments of Biotechnology?
  • Bio-Pharma
  • Bio-Services
  • Bio-Agriculture
  • Bio-Industrial
  • Bioinformatics
BioE3 Policy — Aim, Vision, Focus Areas & Strategic Enablers
Cue WordsNotes
What is the aim of the BioE3 Policy?
  • Boost innovation-driven biomanufacturing.
  • Achieve a $300 bn bioeconomy by 2030.
What is the vision of BioE3?
  • Green growth via a circular bioeconomy using sustainable processes.
What are the focus areas of BioE3?
  • Health/Nutrition — Smart proteins, gene therapy
  • Agriculture/Environment — Soil microbiome, climate-resilient crops
  • Industrial Biotech — Bio-based chemicals, enzymes
  • Energy/Waste — Biofuels, CO2 conversion
  • Space/Defence — Biomanufacturing for food & materials
  • Infrastructure — Pilot facilities, regulatory support
What are the strategic enablers under BioE3?
  • Bio-AI Hubs for genomics & medicine
  • Biomanufacturing Hubs for early-stage R&D
  • Global Standards, Data Governance, streamlined regulation
Why BioE3 Matters, Allied Initiatives & Way Forward
Cue WordsNotes
Why does BioE3 matter across sustainability, nutrition, therapeutics and climate?
  • Sustainability: Green alternative to chemical processes
  • Nutrition Security: Low-emission food solutions
  • Therapeutics: Expanding biopharma market
  • Climate Action: Bio-based carbon mitigation
  • Skill Development: Synthetic biology, bioinformatics
  • Space Solutions: Food & health for space missions
What other bioeconomy initiatives support India's biotech push?
  • BIRAC: Supports biotech entrepreneurship
  • National Biopharma Mission (2017): Biomass, waste-to-energy
  • Mission Innovation – India: Clean energy collaboration
What is the way forward for BioE3 / circular bioeconomy?
  • Promote circular bioeconomy; single-window clearance for startups
  • Retain STEM talent
  • Global partnerships for best practices
  • Build sustainable biomass supply chains
Genetic Engineering — Definition, rDNA, Applications & Challenges
Cue WordsNotes
What is Genetic Engineering and when was the first GMO created?
  • Involves altering an organism's genetic material using gene editing and recombinant DNA technology.
  • First GMO: Created in 1973.
What is Recombinant DNA Technology and where is it applied?
  • Creates new combinations of DNA by adding, deleting, or modifying genes.
  • Applications: Agriculture, medicine, forensics, and biotechnology.
List applications of Genetic Engineering across sectors.
  • Agriculture: GM crops resistant to pests/diseases (e.g., Bt Cotton)
  • Medicine: GM bacteria for insulin, vaccines, hormones
  • Environmental Remediation: Oil spill cleanup using Pseudomonas bacteria and GM algae
  • Industrial: Biofuels, enzymes (e.g., alpha-amylase in brewing)
  • Research: Gene function studies, therapy development
What challenges does Genetic Engineering face?
  • Ethical Concerns: Designer babies, heritable changes
  • Safety Risks: Unpredictable GM traits, ecosystem harm
  • Biodiversity Loss: GM crops outcompeting natural species
  • IP Issues: Patents limiting access
  • Public Perception: Skepticism on health and environment
Genome Editing — Techniques, Synthetic Biology, Gene Drives & Indian Initiatives
Cue WordsNotes
What is Genome Editing?
  • Enables precise DNA alterations using nucleases.
Compare CRISPR-Cas9, ZFNs and TALENs as genome-editing techniques.
  • CRISPR-Cas9: RNA-guided DNA cutting tool
  • ZFNs: Protein binds DNA, cuts specific site
  • TALENs: Similar to ZFNs; precise DNA targeting
What recent developments include Gene Drives and Synthetic Biology?
  • Gene Drives: Spread genes to control malaria via mosquitoes
  • Synthetic Biology: Redesign or create new life forms
What is the way forward for genome editing?
  • Strengthen regulatory frameworks; ensure ethical oversight
  • Promote equity, accessibility, and public awareness
  • Integrate across agriculture, medicine, industry, environment
Which Indian initiatives govern biotech and biosafety?
  • National Biotechnology Policy (2008)
  • National Biosafety Framework (2009)
  • National Centre for Genetic Engineering and Biotechnology
  • National Centre for Biological Sciences
CRISPR-Cas9 — Mechanism, Applications, Challenges & Way Forward
Cue WordsNotes
What is CRISPR-Cas9 and how does it work?
  • A gene-editing tool inspired by bacterial defense, using Cas9 protein and RNA to cut DNA precisely.
  • Works like “genetic scissors”, enabling cut-copy-paste of genes without adding foreign DNA.
What are the applications of CRISPR (including Bt Cotton & DMH-11 Mustard)?
  • Agriculture: Pest/disease-resistant crops (Bt Cotton, DMH-11 Mustard)
  • Medicine: Cancer, HIV, malaria treatments
  • Genetic Research: Study gene function, model diseases
  • Environmental: GM organisms to degrade pollutants
  • Biotech Innovation: Drives synthetic biology, bioengineering
What challenges and ethics issues surround CRISPR-Cas9?
  • Off-Target Effects: Risk of unintended edits
  • Delivery Issues: Gene editing tools hard to deliver
  • Ethics: Designer babies case (China, 2018)
  • Regulation: Global rules for safe use still evolving
What is the way forward for CRISPR deployment?
  • Strong ethical and legal frameworks
  • Tech improvements for accuracy and safer application
Genome Sequencing & Genome Surveillance
Cue WordsNotes
What is Genome Sequencing and what does it enable?
  • Determines the complete DNA sequence of an organism.
  • Enables study of genetic variation, disease prediction, and personalized medicine.
What is Genome Surveillance used for?
  • Tracks disease spread, detects new strains, and monitors vaccine impact via genetic data.
Genome India Project (GIP)
Cue WordsNotes
When was GIP launched, by whom, and what is its scale and storage?
  • Launched 2020 by DBT.
  • Sequencing 10,000 genomes, stored in IBDC.
What is the goal of the Genome India Project?
  • Map genetic diversity for health solutions and precision medicine.
What are the applications of GIP across medicine, drugs, agriculture, forensics and environment?
  • Medical: Diagnosis of hereditary disorders
  • Drug Development: Personalized medicines, drug targets
  • Agriculture: Breeding high-yield, disease-resistant crops
  • Forensics: DNA profiling
  • Environment: Pollutant degradation genes
What issues does GIP face (privacy, regulation, discrimination, capacity)?
  • Privacy & Consent: Sensitive genetic data misuse risk
  • Regulation Gaps: No uniform standards
  • Discrimination: Employment/insurance misuse
  • Other: Costs, cyber threats, lack of skilled manpower
What is the way forward for genomic research under GIP?
  • Strengthen data protection laws with informed consent norms and ethical guidelines.
  • Develop skilled workforce and affordable indigenous technologies to ensure secure, inclusive genomic research.
GM Crops (UPSC 2020) — Definition, Techniques, Benefits & Risks
Cue WordsNotes
What are GM / Transgenic crops? When and where are they grown?
  • GM or Transgenic crops are modified by inserting specific genes to enhance yield, nutrition, or pest resistance.
  • First GM crop: 1996; grown in 25+ countries (200+ varieties).
  • Common crops: soybean, corn, cotton.
What techniques are used to produce GM crops?
  • Recombinant DNA: Cut-paste genes using enzymes
  • Gene Gun: Metal particles carrying genes fired into cells
  • Agrobacterium-mediated: Transfers genes randomly into target DNA
What are the benefits of GM crops (including Bt Cotton economics)?
  • Higher Yields: Resistance to pests/diseases (e.g., Bt Cotton, Pusa Gehun)
  • Less Pesticide Use: Bt crops produce Bt toxin killing pests
  • Better Nutrition: Fortified with vitamins/minerals
  • Improved Quality: Longer shelf life, taste, appearance
  • Climate Resilience: Withstands stresses
  • Global Safety: 20+ years consumption with no health issues
  • Economic Impact: Bt cotton made India a cotton exporter; GM oilseeds can cut edible oil imports
What are the risks of GM crops?
  • Allergies & gene transfer to wild species
  • Ethics: Fear of “designer foods”
  • Unknown Impacts: On soil, biodiversity, health
  • Social Issues: Farmer dependency on MNCs
  • Market Resistance: Consumer skepticism
GM Crops — Regulation in India (Bt Cotton, HTBt, GEAC, FSSAI)
Cue WordsNotes
How are GMOs regulated in India? What is the status of Bt Cotton and HTBt cotton?
  • GEAC (under MoEF&CC) monitors GMOs.
  • Bt Cotton is the only approved crop (Cry1Ac gene from Bacillus thuringiensis).
  • HTBt cotton: Glyphosate-resistant; not approved.
What roles do FSSAI, RCGM, SBCC, DLC and EPA 1986 play?
  • FSSAI Act 2006: GM food ban without approval
  • RCGM, SBCC, DLC: Oversee R&D, state, and field compliance
  • Approval: Case-by-case under Environment (Protection) Act, 1986
Genetic / Breed Improvement in Livestock
Cue WordsNotes
What is the goal of genetic/breed improvement in livestock?
  • Boost productivity and conserve indigenous breeds.
Which techniques and outcomes define livestock genetic improvement?
  • Techniques: Artificial Insemination (AI), IVF, Embryo Transfer Technology (ETT)
  • Outcomes: Disease-free, climate-resilient livestock
Cloning — Types, Applications, Ethics & Way Forward
Cue WordsNotes
What is Cloning?
  • Cloning creates genetically identical copies of organisms or cells.
What are the types of cloning (SCNT, embryonic, gene)?
  • Somatic Cell Nuclear Transfer (SCNT): Somatic cell nucleus inserted into enucleated egg; embryo implanted in surrogate
  • Embryonic Stem Cell Cloning: Embryos created in the lab, divided, and implanted
  • Gene Cloning: For creating or modifying proteins
What are the applications of cloning?
  • Agriculture: Pest/disease-resistant crops
  • Medicine: Organ creation (e.g., liver)
  • Biomedical Research: Animal models for disease studies
  • Livestock Improvement: Superior breeds for food production
  • Species Revival: Revive extinct species (e.g., Dire wolf project)
What ethical concerns arise from cloning?
  • Abuse: Military or commercial misuse
  • Health Risks: Genetic defects, abnormalities, poor immunity
  • Human Value: Risk of discrimination
  • Mental Health: Identity confusion, social stigma
  • Exploitation: Organ trade, unethical practices
What is the way forward on cloning?
  • Ethical Guidelines: Enforce global norms to prevent misuse
  • Therapeutic Focus: Prioritize regenerative medicine over reproductive cloning
  • Awareness: Promote public education and ethical debate
  • Global Cooperation: Harmonize international laws and practices
  • Safe Tech: Invest in stem cell research and organ printing
Stem Cell Therapy (UPSC 2017)
Cue WordsNotes
What is Stem Cell Therapy used for?
  • Uses stem cells to repair tissues and treat diseases like Leukemia, Lymphoma, Myeloma, Sickle Cell.
What are Autologous vs Allogeneic stem cell types?
  • Autologous: Patient's stem cells re-infused post-treatment
  • Allogeneic: Stem cells from donor (related/unrelated)
What are the advantages of Stem Cell Therapy?
  • Targeted treatment, fewer side effects
  • Regenerates damaged tissue
  • Enables drug testing on lab-grown cells
What side effects and GvHD risks exist?
  • Infection, infertility, GI issues
  • Graft-versus-Host Disease: Donor cells attack patients' bodies
CAR-T Cell Therapy (Living Drugs)
Cue WordsNotes
What is CAR-T Cell Therapy?
  • Immunotherapy using genetically modified T cells to fight cancer.
  • Known as Living Drugs for targeted immune response.
What is the process of CAR-T Cell Therapy?
  • T cells extracted → engineered with CAR protein → re-infused → attack cancer cells
What is the significance of CAR-T therapy?
  • Improves immune surveillance & targets cancer precisely.
What challenges does CAR-T face (CRS, neurotoxicity, antigen escape)?
  • Cytokine Release Syndrome: Fever, organ damage
  • Neurotoxicity: Seizures, cerebral edema
  • Antigen Escape: Tumors evade CAR-T cells
What is the way forward for safer CAR-T?
  • Add safety switches, multi-target CARs, and real-time monitoring.
mRNA Vaccines — Mechanism, GEMCOVAC-OM, Pros & Cons
Cue WordsNotes
What are mRNA vaccines and what is India's first indigenous example?
  • Pfizer and Moderna COVID-19 vaccines use mRNA to produce viral protein, triggering immune response.
  • Does not enter the nucleus or alter DNA.
  • India's first indigenous mRNA vaccine: GEMCOVAC-OM (for Omicron).
How do mRNA vaccines work?
  • Introduces mRNA coding for viral protein.
  • The body produces protein → the immune system creates antibodies.
  • Antibodies destroy viruses upon future exposure.
What are the advantages of mRNA vaccines?
  • Rapid Development: No live virus required
  • Flexible: Easily adaptable to new variants
  • Safe: Non-infectious, no genetic alteration
  • Effective: High efficacy (e.g., Pfizer, Moderna)
What are the disadvantages of mRNA vaccines?
  • High Cost & Complexity in production
  • Requires ultra-cold storage (−70°C to −20°C)
  • Anaphylaxis risk (rare)
  • Limited long-term safety data
What is the broader conclusion on mRNA technology?
  • mRNA technology shows promise beyond vaccines for protein therapies and rare disease treatments.
Three-Parent Baby — Mitochondrial Donation Treatment (MDT) [title at line 799]
Cue WordsNotes
What is Three-Parent Baby / Mitochondrial Donation Treatment (MDT)?
  • Also called Mitochondrial Replacement Therapy (MRT) (full write-up continues after line 800 in source).
  • Section heading in source: Three-Parent Baby (Mitochondrial Donation Treatment – MDT).

Coverage note (zero-loss fidelity): Within lines 521–800 of NOTES_FILE.md, the source includes BioE3, Genetic Engineering / Genome Editing, CRISPR-Cas9 (with Bt Cotton & DMH-11 Mustard as application examples only), Synthetic Biology (as a recent development / skill / innovation driver—not a full chapter), Genome India Project, GM Crops & Bt Cotton regulation, CAR-T (general; no NexCAR19), stem cells, cloning, and mRNA. NexCAR19, DNA Barcoding, and a dedicated Gene Editing vs Gene Therapy comparison table are not present in this range and were not fabricated. The requested range doesn't contain biotech/nano material — searching the notes file for those topics.Lines 451–954 of NOTES_FILE.md are IR/UN content, not biotech/nano. Pulling the source sections that match your topics and the existing Cornell format.Confirming: biotech matches S&T OCR lines 451–954; pulling CNT/Graphene/Nano Urea detail for a zero-loss conversion.Source lines 451–954 of NOTES_FILE.md are IR; the biotech block matching those topics is in the S&T OCR (≈451–954). Converting that biotech range plus nanotech (CNTs, Graphene, Nano Urea/DAP) into VitePress Cornell format.Writing the zero-loss Cornell conversion now.# Biotechnology & Nanotechnology

Zero-loss Cornell conversion: Biotechnology (Genome India, CRISPR-Cas9, GM Crops, CAR-T NexCAR19, BioE3) & Nanotechnology (CNTs, Graphene, Nano Urea/DAP). Source: S&T current affairs OCR (biotech block ~L306–954; nanotech ~L4759–4846, Graphene desalination ~L5209) + Shivin S&T nano basics.

1. Biotechnology ​

1A. Gene Editing & CRISPR-Cas9 — Definition, Mechanism, Types & Techniques
Gene Editing & CRISPR-Cas9
Cue WordsNotes
What is the recent gene-edited sheep news (CRISPR-Cas9)?Why in the News:
  • India’s first gene-edited sheep produced by researchers from Kashmir University in collaboration with ICAR using CRISPR-Cas9 technology.
  • Myostatin gene in a lamb was edited, boosting muscle growth by 30% (a trait found in some European breeds such as the Texel, but absent in Indian breeds).
  • No foreign DNA was added, making it different from transgenic animals.
Define gene editing (genome editing) and how it works.About Gene Editing (or Genome Editing):
  • A technology that can change DNA sequences at one or more points in the strand.
How Gene Editing Works:
  • A cell is transfected with an enzyme complex containing a guide molecule and a DNA-cutting enzyme.
  • A specially designed synthetic guide molecule finds the target DNA strand.
  • An enzyme cuts off the target (defective) DNA strand.
  • The defective DNA strand is replaced with a healthy copy.
  • It also involves removing or changing a single base or inserting a new gene altogether.
Differentiate somatic vs germline genome editing.Types of Gene Editing:
  • Somatic genome editing: Alteration of cells that do not contribute to gamete formation and thus cannot be passed on from the individual to offspring.
  • Germline genome editing: Genetic modification of reproductive cells or embryos that creates changes which can potentially be passed down to future generations.
List major gene-editing techniques including CRISPR/Cas9.Techniques used:
  • ZFNs (Zinc Finger Nucleases): Cuts DNA at precise locations.
  • TALENs (Transcription Activator-Like Effector Nucleases): Cuts DNA at precise locations.
  • CRISPR/Cas9 (Clustered Regularly Interspaced Short Palindromic Repeats / Cas9): Uses a small piece of RNA to guide the Cas9 “cutting” protein to the exact spot in the DNA.
  • Homing Endonucleases (Meganucleases): Natural enzymes that can find and cut long sections of DNA.
What are the applications of gene editing?Applications of Gene Editing:
  • Medical & Healthcare:
    • Treatment of Genetic Disorders (e.g., Sickle Cell Anaemia).
    • Cancer Therapy: Editing immune cells (CAR-T therapy) to target cancer cells.
  • Agricultural: Crop Improvement (higher yield varieties, drought-tolerant crops, etc.); enhancing nutritional composition of crops, etc.
  • Industrial & Environmental:
    • Biofuels: Engineering microbes for efficient bioethanol and biodiesel production.
    • Bioremediation: Microbes edited to clean oil spills and heavy metals.
1B. BIRSA-101, Sickle Cell Disease, GlowCas9 & Epigenome Editing
BIRSA-101, SCD, GlowCas9 & Epigenome Editing
Cue WordsNotes
What is BIRSA-101 and who developed it?BIRSA-101:
  • India launched its 1st indigenous CRISPR-based gene editing therapy called BIRSA-101 for Sickle Cell Disease (SCD).
  • A technology transfer agreement has been signed between CSIR-IGIB and Serum Institute of India which aims to enable scalable, affordable enFnCas9 CRISPR-based therapies for SCD and other genetic disorders.
  • Developed by CSIR-Institute of Genomics & Integrative Biology (IGIB).
  • Named BIRSA-101 as it has been dedicated to Bhagwan Birsa Munda on his 150th birth anniversary.
Define Sickle Cell Disease — mechanism, impact, India data and target.Sickle Cell Disease (SCD):
  • Definition: Hereditary blood disorder caused by a mutation in the haemoglobin gene.
  • Mechanism: Leads to sickle-shaped red blood cells that block blood vessels and reduce oxygen delivery to tissues.
  • Impact: Causes anaemia and may damage lungs, heart, kidneys, eyes, bones, and brain.
  • India accounts for ~14.5% of global SCD births (2023). It is mainly prevalent among tribals.
  • Target: India aims to eliminate it by 2047.
What is GlowCas9?GlowCas9:
  • Scientists from Kolkata-based Bose Institute, an autonomous institute under the Department of Science and Technology (DST), have developed GlowCas9.
  • It is a CRISPR protein that lights up while performing gene editing.
  • It emits light because it is fused with nano-luciferase fragments from deep-sea shrimp, which reassemble and emit light when the Cas9 protein folds correctly.
What is epigenome editing and how does it differ from traditional gene editing?Epigenome Editing:
  • It regulates gene expression by modifying the epigenome without changing the DNA sequence.
  • Epigenome consists of chemical compounds that modify, or mark, that regulate gene expression.
  • Unlike traditional gene editing methods that involve cutting DNA, epigenome editing allows for precise control over gene expression (with reversible changes), making it a safer alternative.
1C. GM Crops — Definition, Status in India, Regulation & SDN
GM Crops
Cue WordsNotes
Why are GM crops in the news and what are they?Why in the News:
  • NITI Aayog Member called for adopting GM Crops for Self-Sufficiency in Edible Oils.
About GM Crops:
  • GM Crops are Genetically Modified Organisms (GMOs), i.e. their genetic material (DNA) has been altered artificially for desirable features like robustness, pest resistance, among others.
  • Transgenics are a subset of GMO where one or more DNA sequences from another species have been introduced artificially. E.g., Bt Cotton — contains a gene from a bacterium.
What is the adoption status of GM crops in India?Adoption Status in India:
  • Bt cotton is the only GM crop approved for cultivation.
  • Bt-Brinjal: Cleared by GEAC for commercial cultivation, but put on a moratorium.
  • The Centre conditionally approved herbicide-tolerant GM mustard (DMH-11) for release into the environment; however, this approval is currently under review by the Supreme Court.
Outline the regulatory framework of GM crops in India.Regulatory Framework of GM Crops in India:
  • Food Safety and Standards Act, 2006: Prohibits import, manufacture, use, or sale of GM food without FSSAI’s approval.
  • Review Committee on Genetic Manipulation (RCGM): Under the Department of Biotechnology (DBT); monitors various aspects of R&D projects involving GM organisms.
  • State Biotechnology Coordination Committee (SBCC): Reviews the safety and control measures in various institutions handling Genetically Modified Organisms (GMOs).
  • District Level Committee (DLC): Inspects, investigates, and reports to the SBCC or the GEAC about compliance.
Explain Site Directed Nuclease (SDN) types and India’s SDN1/SDN2 approval.Site Directed Nuclease (SDN):
  • SDN-1: A site-directed mutagenesis without using a DNA sequence template.
  • SDN-2: A site-directed mutagenesis using a DNA sequence template.
  • SDN-3: A site-directed insertion of gene/large DNA sequence using a DNA sequence template.
  • Note: Genome editing of SDN1 and SDN2 types of genes has been approved under India’s biosafety regulations for general crops.
What is GEAC — genesis, ministry and responsibilities?Genetic Engineering Appraisal Committee (GEAC):
  • Genesis: Constituted as a Statutory committee under the “Rules for Manufacture, Use, Import, Export and the Storage of Hazardous Micro-organisms, Genetically Engineered Organisms or Cells, 1989”.
  • The rules are framed under the Environment (Protection) Act, 1986.
  • Ministry: Ministry of Environment, Forest and Climate Change (MoEF&CC).
  • Responsibilities:
    • Appraisal of proposals relating to the release of Genetically engineered (GE) organisms and products.
    • Appraisal of activities involving large-scale use of hazardous microorganisms and recombinants in research and industrial production.
Describe India’s first genome-edited rice varieties (not GM).Genome-Edited Rice:
  • ICAR has developed India’s first genome-edited (GE) rice varieties: DRR Rice 100 (Kamla) and Pusa DST Rice.
  • India became the first country in the world to develop GE rice varieties.
  • Developed using Genome editing technology based on CRISPR-Cas.
About the varieties:
  • DRR Dhan 100 Kamala: Developed by ICAR–IRR (Indian Institute of Rice Research), Hyderabad. Improvement of ‘Samba Mahsuri’ by targeting the CKX2 (Cytokinin Oxidase 2) gene. A cytokinin is a plant hormone that influences growth and the stimulation of cell division.
  • Pusa DST Rice 1: Developed by ICAR–Indian Agricultural Research Institute (IARI), New Delhi. Improved version of the fine-grain rice MTU1010 (Cottondora Sannalu).
  • Note: These two new varieties contain no foreign DNA, and therefore are not considered GM Crops.
1D. Genome India Project & Related Genome Sequencing Initiatives
Genome India Project
Cue WordsNotes
What is the Genome India Project — genesis, objective and data storage?Why in the News:
  • Preliminary findings of the GenomeIndia Project published in the Journal Nature Genetics.
About GenomeIndia Project:
  • Genesis: Initiated by Department of Biotechnology (DBT) with collaborations of 20 institutions to map India’s genetic diversity.
  • Objective: Build a comprehensive catalogue of genetic variations that reflect unique diversity of Indian population.
  • Data Storage: Indian Biological Data Centre (IBDC) at Faridabad (Haryana).
  • IBDC is India’s first national life science data repository, supported by DBT.
List other key initiatives for genome sequencing (India and global).Other Key Initiatives for Genome Sequencing:
  • IndiGen program: Initiated by the Council of Scientific and Industrial Research (CSIR).
  • ‘One Day One Genome’ Initiative: Initiated by DBT.
  • Human Genome Project (HGP): An international collaboration that aimed to map and sequence the entire human genome.
  • 100,000 Genomes Project: England’s very first initiative sequencing 100,000 genomes.
  • International HapMap Project: Analyzing over a million variants in African, Asian, and European ancestry groups.
1E. Related Biotech Developments — Gene Drive, Organ-on-Chip, RNA Silencing, Pangenome, SHUKR, DNA Profiling, Jumping Genes
Related Biotech Developments
Cue WordsNotes
What is Gene-Drive Technology (GDT) and its key components?1.1.4.1 Gene-Drive Technology (GDT):
  • GDT can stop insects from spreading vector-borne diseases (mosquitoes) and pests that attack plants.
  • A type of genetic engineering technique that modifies genes to alter Mendelian inheritance (normal).
  • Mendelian inheritance refers to certain patterns of how traits are passed from parents to offspring.
  • Increases the likelihood that a particular suite of genes will be passed onto the next generation.
  • Key Components: Gene, Cas9 enzyme and CRISPR.
Explain Organ-on-a-Chip (OoC) technology.1.1.4.2 Organ-on-Chip (OoC) Technology:
  • Organ-on-a-chip (OoC) can transform drug development.
  • Refers to micro-scale system used for mimicking the human body environment.
  • It is one of the human-relevant 3D culture models, also known as ‘New Approach Methods’ (NAMs).
  • 3D culture system allows researchers to recreate human organs and diseases in one dish.
  • Mechanism: Cells are placed on a chip and allowed to grow into 3D structures with the help of a polymer that resembles real tissue in the human body.
  • Benefit: Provides a human-relevant, ethical, and cost-effective platform for accurate drug testing, disease modeling, and personalized medicine.
What is RNA silencing and how do miRNAs work?1.1.4.3 RNA Silencing:
  • Antiviral agent developed by Germany-based researchers using RNA silencing provides protection against cucumber mosaic virus (CMV), responsible for 25–30% yield losses in banana plantations.
  • Techniques used to strengthen plant immunity against CMV include Host-Induced Gene Silencing (HIGS) and Spray-Induced Gene Silencing (SIGS).
What is RNA Silencing?
  • Gene regulation mechanism that reduces gene expression by either suppressing transcription (transcriptional gene silencing [TGS]) or degrading specific RNA after transcription (posttranscriptional gene silencing [PTGS] / RNA interference [RNAi]).
  • It can turn down or completely shut off the activity of specific genes.
  • Involves small RNA molecules (like siRNA or miRNA) that can bind to messenger RNA (mRNA).
  • When these small RNAs bind to mRNA, they either: destroy the mRNA (so the protein can’t be made), or block the mRNA from being read by the cell’s protein-making machinery.
microRNA (miRNA):
  • A small non-coding RNA that helps cells regulate gene expression.
  • Controls gene expression by binding with mRNA and preventing them from being translated into proteins or by degrading or destroying mRNA altogether.
  • Proteins in the nucleus regulate RNA transcription and splicing while microRNAs control the translation and degradation of mRNA in the cytoplasm.
  • Transcription copies a gene’s DNA sequence into mRNA, and translation decodes that mRNA into a specific protein.
What is a pangenome and what is PacBio HiFi sequencing?1.1.4.4 Pangenome:
  • Chinese Scientists created first Pangenome of Asian rice with the help of ‘PacBio high-fidelity’ (HiFi) sequencing technology.
  • HiFi Sequencing Technology is a single-molecule, real-time sequencing technology (SMRT) that provides incredible single-molecule read accuracy across long reads.
  • It is a kind of Long-read sequencing method of genome sequencing.
What is a Pangenome?
  • Collection of genome sequences from many individuals of the same species.
  • Key Applications:
    • Agriculture: Helps in introducing new traits for disease-tolerance as well as resilience in crops against climate shocks.
    • Precision Medicine: In humans, helps in identifying population-specific genetic markers for diseases. E.g., Human Pangenome Project.
What is the SHUKR gene?1.1.4.5 SHUKR Gene:
  • Researchers from CSIR-Centre for Cellular and Molecular Biology (CCMB), Hyderabad, shed light on the molecular innovations in flowering plants that help explain the “abominable mystery” through newfound gene, called SHUKR (or sperm).
  • Controls a group of genes called F-box, which help manage proteins involved in developing healthy pollen.
  • SHUKR and its F-box genes evolve fast, explaining Darwin’s “abominable mystery” or the sudden rise and success of flowering plants in evolutionary history.
Explain DNA profiling methods (STR, mtDNA, Y chromosome, SNPs).1.1.4.6 DNA Profiling:
  • DNA Identification/profiling used to identify suspects or victims at Red Fort blast site.
  • A technique used to identify individuals by analyzing unique patterns in their DNA.
  • Based upon the variability between individuals of several noncoding regions of DNA, called VNTRs (Variable Number of Tandem Repeats).
  • Key Methods:
    • Short Tandem Repeat (STR): Examines short repeating DNA sequences in the nucleus.
    • Mitochondrial DNA (mtDNA): Used if nuclear DNA is degraded.
    • Y chromosome: Focuses on STRs on the Y chromosome, inherited father to son. Identifies male victims by matching paternal male relatives.
    • Single Nucleotide Polymorphisms (SNPs): SNPs are single-base differences unique to individuals, matched with personal items like toothbrushes.
What are jumping genes (transposable elements) and TnpB?1.1.4.7 Jumping Genes:
  • A new study reveals that LINE-1, a jumping gene, binds to cellular DNA during brief periods of cell division.
  • Recently, ICAR patented Transposon-associated proteins (TnpB) based Genome Editing technology.
About Jumping Gene (Transposable Elements):
  • DNA sequences that move from one location to another on the genome thus affecting the expression of genes.
  • They can do so either by physically cutting and pasting themselves or by copying themselves to new locations.
  • In the process, they may cause mutations and increase (or decrease) the amount of DNA in the cell genome.
  • In human beings, more than 50% of the genome is composed of transposable elements.
1F. CAR-T Therapy & NexCAR19
CAR-T Therapy & NexCAR19
Cue WordsNotes
What is NexCAR19 and who developed it?Why in the News:
  • NexCAR19, India’s first indigenous CAR T-cell therapy, has been unveiled by the Prime Minister.
More on the News:
  • NexCAR19 therapy has been developed for B-cell blood cancers by ImmunoACT (a company incubated under IIT Bombay, and Tata Memorial Hospital), supported by DBT and Biotechnology Industry Research Assistance Council (BIRAC).
  • Earlier, Central Drugs Standard Control Organisation (CDSCO) has approved Qartemi, a CAR T-cell therapy for treating blood cancer.
Explain Chimeric Antigen Receptor T-cell (CAR-T) therapy.What is Chimeric Antigen Receptor T-cell (CAR-T) Therapy?
  • Patient’s T cells are collected from the blood and genetically modified in a laboratory.
  • A special receptor called CAR (Chimeric Antigen Receptor) is added to these T cells, enabling them to recognize and attack cancer cells more effectively.
  • It is considered as a “living drug”.
What are the advantages and challenges of CAR-T therapy?Advantages of CAR-T therapy:
  • Long Term Remission: CAR-T therapy can keep cancer at bay for long periods, reducing treatment cycles.
  • Personalized Treatment: CAR-T uses a patient’s own modified T-cells.
  • Short treatment Duration: Entire process takes approximately 45 days.
Challenges:
  • Cytokine Release Syndrome: Systemic inflammatory response caused by cytokines released from infused CAR T cells, which can lead to organ dysfunction.
  • Antigen Escape: Tumors develop resistance by losing antigen targeted by CAR-T cells.
  • Other: Neurotoxicity, etc.
1G. Mitochondrial Replacement Therapy (MRT)
Mitochondrial Replacement Therapy
Cue WordsNotes
What is mitochondrial disease and how does MRT work?Why in the News:
  • A clinical trial in the United Kingdom successfully protected eight babies, at high risk of inheriting ‘mitochondrial diseases’ from their moms, through mitochondrial donation or Mitochondrial Replacement Therapy (MRT).
What is Mitochondrial Disease?
  • Mitochondria: Tiny “power plants” inside almost every cell; generate more than 90% of the energy in cells.
  • Mitochondrial DNA: Mitochondria have their own DNA, distinct from nuclear DNA. Affects energy production but not physical characteristics.
  • Mitochondrial Disease: When mitochondria are not working properly, cells don’t have enough energy and begin to die. When too many cells die, whole organ systems can fail, which can be life-threatening.
  • Mitochondrial diseases are exclusively inherited from the child’s mother.
About Mitochondrial Replacement Therapy (MRT):
  • A new form of reproductive in vitro fertilization (IVF) which works on the principle of replacing a woman’s abnormal mitochondrial DNA (mt-DNA) with the donor’s healthy one.
  • In MRT an embryo contains:
    • Nuclear DNA from a man and a woman (the prospective mother)
    • Mitochondria in an egg donated by another woman (the mitochondrial donor)
  • Since the child born will have three distinct genetic materials, it is called a Three-Parent Baby.
  • Techniques: Maternal Spindle Transfer (MST) and Pronuclear Transfer (PNT). PNT is done after fertilization whereas MST is done before fertilization.
1H. Stem Cells & Animal Stem Cell Biobank
Stem Cells
Cue WordsNotes
Define stem cells and their key types (pluripotent, iPSC, ESC, ASC).Why in the News:
  • A study has found that stem cells extracted from adipose tissue (body fat) can aid in the healing of osteoporosis-related fractures in humans.
  • Osteoporosis is a disease which makes bones weak and fragile.
About Stem Cells:
  • Meaning: Unspecialized cells that can self-renew indefinitely and can also differentiate into more mature cells with specialized functions.
  • In humans, they have been identified in inner cell mass of the early embryo; in some tissues of foetus, umbilical cord, placenta; and in several adult organs.
  • Key Types: Pluripotent stem cells (embryonic stem cells and induced pluripotent stem cells) and Nonembryonic/Somatic/Adult stem cells.
  • Pluripotent stem cells: Ability to differentiate into all cells of the adult body.
  • Induced Pluripotent Stem Cells (iPSCs): Created through the introduction of embryonic genes into a somatic cell (e.g., Skin Cell) causing it to revert back to a “stem cell like” state.
  • Embryonic Stem Cells (ESCs): Found in the embryo (3–5 days post fertilization and prior to implantation) containing an inner cell mass capable of generating all the specialized tissues of human body.
  • Adult Stem Cells (ASCs): Undifferentiated cells found in tissue or organ and can differentiate to yield the specialized cell types of that tissue or organ. Key types include: Neural Stem Cells; Skin Stem Cells, etc.
What is India’s Animal Stem Cell Biobank at NIAB Hyderabad?Animal Stem Cell Biobank:
  • India’s first state-of-the-art animal stem cell biobank and laboratory inaugurated at National Institute of Animal Biotechnology (NIAB), Hyderabad.
  • Key Features: Stem cell culture unit, 3D bioprinter, bacterial culture lab, cryostorage, etc.
  • Significance: Focus on regenerative medicine and cellular therapies for livestock; advance research in disease modelling, tissue engineering, etc.
  • Supported by: National Biopharma Mission (NBM) of Department of Biotechnology – BIRAC.
  • NBM is an Industry-Academia Collaborative Mission for accelerating biopharmaceutical development.
1I. Phenome India National Biobank
Phenome India National Biobank
Cue WordsNotes
What is the National Biobank and the Phenome India Project?Why in the News:
  • National Biobank inaugurated at the CSIR-Institute of Genomics and Integrative Biology (IGIB).
About National Biobank:
  • Launched under Phenome India Project.
  • Based on the UK Biobank model, but customized for Indian diversity.
  • Purpose: Aid in early diagnosis, improve therapeutic targeting, and bolster the fight against complex diseases such as diabetes, cancer, and rare genetic disorders.
  • It will generate high-resolution data that can power AI-driven diagnostics and gene-guided therapies.
  • Coverage: Will collect comprehensive genomic, lifestyle, and clinical data from 10,000 individuals.
About Phenome India Project:
  • Officially called Phenome India-CSIR Health Cohort Knowledgebase (PI-Check).
  • Launched by: Council of Scientific and Industrial Research (CSIR).
  • Objective: Long-term, data-rich study tracking the health trajectories of individuals over several years.
What is Phenome?
  • Phenome is the entire set of phenotypes in a cell, tissue, organ, organism or species.
  • Phenotype refers to the observable physical characteristics of an organism (appearance, development, and behavior).
  • An organism’s phenotype is determined by its genotype as well as by environmental influences upon these genes.
1J. Biochemical Markers, National Biofoundry Network & BioE3 Policy
Biofoundry Network & BioE3 Policy
Cue WordsNotes
What are biochemical markers and examples for kidney complications?1.6.1 Biochemical Markers:
  • Indian researchers have identified biochemical markers in the blood that could help detect kidney complications in diabetic patients.
  • Meaning: Small molecules (like sugars, amino acids, lipids) produced during metabolic processes in the body and used by doctors for ascertaining disease risks. E.g., cholesterol tests for heart disease risk.
  • Components for identifying kidney complication: arabitol, myo-inositol, ribothymidine, etc.
What is a biofoundry and the National Biofoundry Network?1.6.2 National Biofoundry Network:
  • India’s first National Biofoundry Network was launched in August 2025, which also marked the first anniversary of India’s BioE3 Policy.
  • Biofoundry: An automated facility that rapidly designs, builds, and optimizes engineered organisms by integrating DNA synthesis, gene editing, and high-throughput biomanufacturing workflows.
About National Biofoundry Network:
  • Objectives: Aid in the scale-up of proof-of-concept projects into viable technologies.
  • Component of BioE3 Policy, categorized as Bio enablers.
  • Functions: Scaling up research activities.
What is the BioE3 Policy — full form, launcher and aims?About BioE3 Policy:
  • BioE3 (Biotechnology for Economy, Environment and Employment) Policy is India’s first policy in Biotechnology.
  • Launched by the DBT, under Ministry of Science & Technology.
  • Aims to revolutionize biomanufacturing which includes sectors like precision biotherapeutics, carbon capture and utilisation, functional foods and smart proteins, etc.
What is the DEEP project and epigenetics?1.6.3 Diverse Epigenetic Epidemiology Partnership (DEEP) Project:
  • CSIR-Centre for Cellular and Molecular Biology (CCMB) is collaborating with research groups across the world on the DEEP project.
  • Epigenetics is the study of how your behaviours and environment can cause changes that affect the way your genes work.
  • Unlike genetic changes, epigenetic changes are reversible and do not change the DNA sequence, but they can change how body reads a DNA sequence.
About DEEP Project:
  • A five-year project led by researchers at the University of Bristol, London and the CSIR CCMB in India.
  • Objective: Improve global health by exploring the effects of genomic and environmental diversity on disease risk across the global population.

2. Nanotechnology ​

2A. Nanotechnology — Definition, Types, Applications & Challenges
Nanotechnology Core
Cue WordsNotes
Define nanotechnology and types of nanomaterials.Definition:
  • Involves working with materials and devices at the nanoscale, typically ranging from 1 to 100 nm in size (nanoparticle).
  • On the nanometer scale, materials may exhibit unusual properties. Their properties depend on shape, size, surface characteristics, and inner structure.
Types:
  • Natural nanomaterials: E.g., Volcanic ash.
  • Artificial nanomaterials: E.g., Carbon Nanotube.
Concern/Challenge:
  • Potential toxicity of nanoparticles to humans and the environment.
List key applications of nanotechnology by sector.Key Applications of Nanotechnology:
  • Agriculture: Nanofertilizers (nutrient uptake with 90–100% utilization efficiency), Nanobiosensors (monitor soil conditions), etc.
  • Health: Better imaging and diagnostics, Targeted Drug Delivery, etc.
  • Energy: Nanostructured solar cells could be cheaper to manufacture and easier to install, etc.
  • Environment: Nanomaterials can be employed in water purification and desalination technologies, etc.
  • Electronics and IT: Quantum dots and other nanostructures can be used to develop advanced displays, lighting, etc.
  • Other: Cosmetics (uses nanoparticles of some metallic oxides), etc.
2B. Carbon Nanotubes (CNTs)
Carbon Nanotubes (CNTs)
Cue WordsNotes
What are Carbon Nanotubes — structure, features and applications?Carbon Nanotubes (CNTs) — related to Buckminster fullerene / carbon nanostructures:
  • Structure: Cylindrical hollow figure with graphite sheets.
  • Features:
    • Lightweight
    • High tensile strength
    • Electrical conductivity
    • Not bio-compatible
  • Applications: Electronics, Automotive, Sports, Space, Aerospace industry.
  • Classified as artificial nanomaterials (example of engineered nanomaterial at 1–100 nm scale).
Sector-wise CNT uses:
  • Energy: Carbon Nanotubes (CNT) in PV cells; nanotube scrubbers & electrostatic precipitators.
  • Electronics: CNTs replacing silicon-based chips; nanowires & nanotubes (1D) — diameter and structure can make them conductors or semiconductors for nano-electronics.
  • Agriculture (related carbon nanomaterials): Carbon Nanoparticles enhance seed germination; CNT-based ethylene sensors for crop monitoring (smart delivery / sensing).
2C. Graphene
Graphene
Cue WordsNotes
What is Graphene and what are its key properties and applications?Graphene (2D nanomaterial):
  • Its unique zero band gap enables ultra high conductivity for flexible electronics.
  • Electronics: Graphene for flexible touch screens.
  • Energy: Graphene for green hydrogen production.
Recent News — Desalination:
  • IIT Bombay scientists developed a new hydrophobic Graphene-based lotus leaf-like solar evaporators that can facilitate water desalination.
Key Desalination Technologies (context):
  • Thermal Technology: Heating of saline water and collecting the condensed vapor (distillate) to produce pure water. Usage: mainly for seawater desalination. E.g., Low Temperature Thermal Desalination (LTTD) plants, Lakshadweep.
  • Membrane Technology: Feedwater is pumped through semi-permeable membranes to filter out the dissolved solids. Usage: mainly for brackish water desalination. E.g., Nemmeli Seawater Desalination Plant, Tamil Nadu, on Reverse Osmosis (largest desalination plant in South Asia).
2D. Nano Urea, Nano-DAP & Nano Fertilizers
Nano Urea / Nano-DAP / Nano Fertilizers
Cue WordsNotes
What are nano fertilizers and IFFCO’s Nano Urea / Nano-DAP timeline?Why in the News:
  • Indian Farmers Fertilizer Cooperative Limited (IFFCO) to set up its first overseas nano fertiliser plant in Brazil.
  • IFFCO had launched world’s first ‘Nano Liquid Urea’ fertiliser in 2021 & then Nano-DAP in 2023.
About Nano Fertilizers:
  • Nutrients encapsulated or coated within nanomaterial (measuring 100 nanometres or less).
  • Enables controlled release and its subsequent slow diffusion into the soil.
  • Nanoscale nitrogen particles which have more surface area and number of particles.
  • India: first country globally to start commercial production of nano urea.
Significance (claimed):
  • Reduces urea requirement.
  • Improves soil, air & water quality.
  • Cheaper relative to conventional high-volume urea use in some claims.
  • Sprayed on plants (foliar) to prevent soil damage (IFFCO nano urea and DAP).
How are nano fertilisers applied and what related products has IFFCO got FCO approval for?Application of Nano Fertilizers:
  • Foliar spray: Sprayed on leaves (Nano Urea) — sprayed on leaves, not root; at flowering stages in study contexts.
  • Soil Application: Sown/released (Nano Phosphorus).
  • Seed Treatment: Coating on seeds (Nano Zinc).
  • Hydroponic & Drip: Nutrient/pesticide supply (Nano Copper).
IFFCO FCO approvals:
  • IFFCO received FCO approval for nano zinc liquid, nano copper liquid fertilisers (addresses nutrient deficiency: Zinc → enzyme functioning; Copper → enzymatic activities & chlorophyll production).
  • Earlier: Nano liquid urea and Nano liquid DAP also approved.
  • FCO under Essential Commodities Act, 1955 regulates production, distribution & quality of fertilizer.
What caveats exist on Nano Urea yield claims?Nano-urea reduced grain yield: study (key findings):
  • Protein content issues reported; yield concerns in paddy and wheat grain in some study findings.
  • One spray of 80 ml nano urea claimed in some materials to replace a large quantity of conventional nitrogen — but studies have flagged lack of evidence for yield gain and plant uptake efficiency concerns (root development issues).
What is TERI’s Nano-sulphur and how does it differ from nano urea?TERI’s Nano-sulphur:
  • TERI scientists have developed nano sulphur which reportedly increased mustard yield by 30–40%.
  • It is a completely green product that uses biological agents like plant promoting bacteria that secrete enzymes and metabolites.
  • This makes it different from other nano-fertilizers such as nano urea.
  • Nano-sulphur has antibacterial and insecticidal properties.
What is a nanozyme (related nano application)?Nanozyme:
  • Researchers at Indian Institute of Science (IISc) developed an artificial metal-based nanozyme (vanadium pentoxide (V₂O₅)) to clamp down on abnormal blood clotting caused by conditions like pulmonary thromboembolism (PTE).
  • Under normal conditions, an injured blood vessel witnesses the activation of platelets to form clots; under PTE overactivation of platelets occurs causing excess blood clots or thrombosis leading to mortality.
  • About Nanozymes: Nanomaterials with intrinsic enzyme-like properties. Compared to natural enzymes, they exhibit unique advantages including high catalytic activity, low cost, high stability, easy mass production, etc.

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