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UPSC 1999: Assertion (A): Insect-resistant transgenic cotton has been produced by inserting Bt gene. Reason (R): The Bt gene is derived from a bacterium.
(a)Both A and R are true, and R is the correct explanation of A
(b)Both A and R are true, but R is not a correct explanation of A
(c)A is true, but R is false
(d)A is false, but R is true
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Not attemptedCorrect Answer: (a) Both A and R are true, and R is the correct explanation of A
The insect-resistant ‘Bt cotton’ was created by inserting the cry1Ac gene from the soil bacterium Bacillus thuringiensis (Bt) into cotton; the gene makes the plant produce Bt toxin that kills boll-worms. Hence both statements are correct and the Reason correctly explains the Assertion. Other options fail because the truth-value or explanatory link is broken. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Bt_cotton?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 1999 Science & Technology question?▼
The correct answer is option (a): Both A and R are true, and R is the correct explanation of A. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Biotechnology & Genetics question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1999, GS Paper 1, as Question 129. It falls under Science & Technology > Biotechnology & Genetics.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Biotechnology & Genetics?▼
UPSC has asked 54 questions from Biotechnology & Genetics (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.