Biotechnology Milestones Every Exam Asks: BT Cotton, Golden Rice and India’s Bt Brinjal Ban
Quick Answer: The three biotechnology milestones every competitive exam repeatedly asks about are: Bt Cotton, India’s first and only commercially approved GM crop (approved by GEAC in 2002); Golden Rice, a biofortified variety engineered with psy and crtI genes to produce beta-carotene (approved for cultivation in the Philippines in 2021, not in India); and Bt Brinjal, approved by GEAC in 2009 but placed under an indefinite moratorium in February 2010 by Environment Minister Jairam Ramesh.
- Why Biotechnology Matters in UPSC Science & Tech
- Bt Cotton: India’s First and Only Approved GM Crop
- The Science Behind Bt Toxin
- Golden Rice: Fighting Vitamin A Deficiency
- Bt Brinjal: The 2010 Moratorium Story
- Key Regulators: GEAC, CDSCO and the Rules of 1989
- Other Biotech Landmarks: Insulin, Humulin and India’s Recombinant Vaccines
- GM Crops in India: Current Status
- Arguments For and Against GM Crops (Mains Answer Material)
- Previous Year Question Patterns on Biotech
- One-Page Revision Table: Facts to Memorise
- Frequently Asked Questions
- Q: Is Bt Cotton the only GM crop approved in India?
- Q: Why is Golden Rice golden in colour?
- Q: Which country first approved Bt Brinjal for cultivation?
- Q: What is the full form of GEAC and under which ministry does it function?
- Q: Is GM Mustard approved in India?
- Related reading
Why Biotechnology Matters in UPSC Science & Tech
Biotechnology is a recurring theme in UPSC GS Paper III (Science and Technology), SSC General Awareness, and Banking awareness sections. Questions typically test three things: chronology of GM crop approvals, identification of regulators (GEAC, RCGM), and conceptual understanding of how recombinant DNA technology works. In mains, GM crops appear under agriculture, food security, and environment headings — making this topic genuinely multi-dimensional. The following exam-ready notes consolidate the verified facts.
Bt Cotton: India’s First and Only Approved GM Crop
Bt Cotton holds the distinction of being the first and only GM crop approved for commercial cultivation in India. The Genetic Engineering Appraisal Committee (GEAC) cleared it for commercial release in March 2002, following extensive trials of hybrids developed by Mahyco (Maharashtra Hybrid Seeds Company) in collaboration with Monsanto.
- Crop: Cotton (Bollgard hybrids)
- Gene inserted: Cry1Ac gene from the soil bacterium Bacillus thuringiensis
- Target pest: Bollworm complex (American bollworm, pink bollworm, spotted bollworm)
- Year of approval: 2002 (by GEAC)
- Later version: Bollgard II (Cry1Ac + Cry2Ab), approved in 2006
Bt Cotton dramatically reduced insecticide sprays against bollworms and made India one of the world’s largest cotton producers. For official records on India’s biosafety framework, refer to the Ministry of Environment, Forest and Climate Change and research publications from ICAR.
The Science Behind Bt Toxin
Exams frequently ask: how does Bt toxin kill insects but remain safe for humans? The answer lies in the alkaline environment of the insect gut.
- The Bt gene produces an inactive protoxin (Cry protein crystal) inside the plant.
- When an insect larva feeds on the plant, the alkaline pH (around 9–10.5) of its midgut dissolves the crystals.
- Intestinal proteases cleave the protoxin into the active toxin.
- The activated toxin binds to specific receptors on the insect’s midgut epithelial cells, causing cell lysis, gut paralysis, and death of the larva.
Why humans are safe: The human stomach is highly acidic (pH around 1.5–2), which destroys the Cry protein before activation. Moreover, human intestinal cells lack the specific receptor that the activated Bt toxin requires to bind. This receptor-specificity is why the same protein is lethal to bollworms and harmless to mammals. Bacillus thuringiensis has also been used for decades as a biopesticide spray in organic farming, supporting its safety record.
Golden Rice: Fighting Vitamin A Deficiency
Golden Rice is a variety of Oryza sativa genetically engineered to produce beta-carotene (pro-vitamin A) in the endosperm, giving the grain its characteristic golden-yellow colour.
- Genes inserted: psy (phytoene synthase, from daffodil or maize) and crtI (bacterial phytoene desaturase, from Erwinia uredovora)
- Developed by: Ingo Potrykus and Peter Beyer (1999); later advanced by the International Rice Research Institute (IRRI) and the Golden Rice Humanitarian Board
- Purpose: Combat vitamin A deficiency, a leading cause of childhood blindness and immune deficiency in developing countries
- Regulatory status: Approved for cultivation in the Philippines in 2021 — the world’s first such approval; not approved in India
Note: In 2024, the Philippines Court of Appeals revoked the biosafety permit for Golden Rice on procedural grounds, a development worth tracking for current-affairs sections.
Bt Brinjal: The 2010 Moratorium Story
Bt Brinjal (event EE-1), carrying the cry1Ac gene against the fruit and shoot borer (Leucinodes orbonalis), was developed by Mahyco with the University of Agricultural Sciences, Dharwad, and Tamil Nadu Agricultural University, Coimbatore.
- 2009: GEAC approved Bt Brinjal for commercial cultivation (October 2009).
- February 2010: Environment Minister Jairam Ramesh imposed an indefinite moratorium on its release, citing unresolved scientific and public concerns after nationwide consultations.
- 2013: Bangladesh approved Bt Brinjal for cultivation — the first country to do so.
Exams often frame this as a chronology question: GEAC approval 2009 → moratorium 2010 → Bangladesh approval 2013.
Key Regulators: GEAC, CDSCO and the Rules of 1989
India’s GM regulatory architecture operates under the Environment (Protection) Act, 1986, operationalised by the Rules for the Manufacture, Use, Import, Export and Storage of Hazardous Microorganisms, Genetically Engineered Organisms or Cells, 1989 (the “Rules of 1989”).
- RCGM (Review Committee on Genetic Modification): Under DBT; reviews and approves research-level trials and biosafety data generation.
- GEAC (Genetic Engineering Appraisal Committee): Under the Ministry of Environment, Forest and Climate Change (MoEFCC); the apex body approving large-scale trials and commercial release of GM organisms. Earlier called the “Genetic Engineering Approval Committee” — renamed “Appraisal” in 2010.
- CDSCO: Regulates recombinant pharmaceuticals (vaccines, biologics) under the Drugs and Cosmetics Act; rDNA drugs also require GEAC clearance for manufacturing involving GMOs.
Verify regulatory updates at moef.gov.in and pib.gov.in.
Other Biotech Landmarks: Insulin, Humulin and India’s Recombinant Vaccines
Two classic one-liner facts:
- Humulin (1982): The first recombinant DNA drug approved for human use — human insulin produced by engineered E. coli (Eli Lilly, using Genentech’s technology).
- India’s recombinant Hepatitis B vaccine: Indigenously developed by Bharat Biotech (Hyderabad) using yeast expression technology — a landmark in India’s self-reliance in recombinant therapeutics.
- Other landmarks worth knowing: recombinant hepatitis B vaccine by Shantha Biotechnics (1997) and India’s DNA and protein subunit vaccine platforms in recent years.
GM Crops in India: Current Status
As of now, Bt Cotton remains the only GM crop approved for commercial cultivation in India. The most significant pending case is GM Mustard (DMH-11), a transgenic hybrid mustard developed by Delhi University’s Centre for Genetic Manipulation of Crop Plants under Dr. Deepak Pental. The GEAC recommended its environmental release in October 2022; however, final approval for commercial cultivation has remained pending amid ongoing litigation and review, including Supreme Court-appointed expert committee scrutiny. Treat the final status as evolving — check current PIB releases before the exam.
Arguments For and Against GM Crops (Mains Answer Material)
| Arguments For | Arguments Against |
|---|---|
| Higher yields and reduced insecticide use (Bt Cotton experience) | Biosafety concerns: gene flow to wild relatives, effects on non-target organisms |
| Improved farmer income in many studies | Seed monopoly and high seed costs (royalty, trait fees) |
| Nutritional fortification (Golden Rice addresses vitamin A deficiency) | Emergence of secondary pests and pink bollworm resistance |
| Climate resilience (drought/salinity-tolerant varieties in pipeline) | Labelling and consumer choice debates; liability questions |
| Reduced pesticide exposure for farm workers | Dependence of farmers on seed companies each season |
Previous Year Question Patterns on Biotech
- Regulator identification: “GEAC functions under which ministry?” (Answer: MoEFCC)
- Chronology: Arranging approvals in order — Bt Cotton (2002), Bt Brinjal moratorium (2010), Bangladesh approval (2013)
- Match-the-following: Matching crops with inserted genes — Cotton/Cry1Ac, Brinjal/cry1Ac, Golden Rice/psy + crtI
- Conceptual MCQs: Mechanism of Bt toxin activation in alkaline insect gut (a UPSC preliminary-level favourite)
- Assertion-Reason: Golden Rice’s colour due to beta-carotene accumulation
One-Page Revision Table: Facts to Memorise
| Crop/Product | Gene(s) | Year | Regulator/Body | Status |
|---|---|---|---|---|
| Bt Cotton | Cry1Ac (Bollgard); +Cry2Ab (Bollgard II) | 2002 | GEAC | Approved; only GM crop cultivated in India |
| Golden Rice | psy, crtI | Philippines approval 2021 | IRRI / national regulators | Not approved in India |
| Bt Brinjal (EE-1) | cry1Ac | 2009 approval; 2010 moratorium | GEAC / Jairam Ramesh | Indefinite moratorium in India; approved in Bangladesh 2013 |
| GM Mustard (DMH-11) | Barnase-Barstar system | GEAC recommendation Oct 2022 | GEAC / MoEFCC | Pending final cultivation approval |
| Humulin | Human insulin gene in E. coli | 1982 | US FDA | First rDNA drug |
Frequently Asked Questions
Q: Is Bt Cotton the only GM crop approved in India?
Yes. Since its approval in 2002, Bt Cotton remains the only GM crop commercially approved for cultivation in India. Bt Brinjal was approved in 2009 but placed under moratorium in 2010, and GM Mustard DMH-11’s final cultivation approval is still pending.
Q: Why is Golden Rice golden in colour?
Golden Rice is golden because the inserted psy and crtI genes enable the grain’s endosperm to produce beta-carotene (pro-vitamin A), the same pigment that colours carrots. Regular rice endosperm does not accumulate carotenoids.
Q: Which country first approved Bt Brinjal for cultivation?
Bangladesh, in 2013 — three years after India imposed its indefinite moratorium in February 2010.
Q: What is the full form of GEAC and under which ministry does it function?
GEAC stands for Genetic Engineering Appraisal Committee, and it functions under the Ministry of Environment, Forest and Climate Change (MoEFCC). It is the apex body for approving commercial release of GM organisms in India.
Q: Is GM Mustard approved in India?
Not fully. The GEAC recommended environmental release of DMH-11 in October 2022, but final approval for commercial cultivation has remained pending, with the matter under judicial and expert review. Verify the latest status before your exam.
Related reading
- Fusion vs Fission Energy: Nuclear Physics Basics for Science & Technology Exam Questions
- Nuclear Power Plants in India: State-Wise Map, Capacity and Reactor Types for Exams
Quick revision
- Crop: Cotton (Bollgard hybrids)
- Gene inserted: Cry1Ac gene from the soil bacterium Bacillus thuringiensis
- Target pest: Bollworm complex (American bollworm, pink bollworm, spotted bollworm)
- Later version: Bollgard II (Cry1Ac + Cry2Ab), approved in 2006
- The Bt gene produces an inactive protoxin (Cry protein crystal) inside the plant.
- When an insect larva feeds on the plant, the alkaline pH (around 9–10.5) of its midgut dissolves the crystals.
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