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UPSC 2001: Assertion (A): Scientists can cut apart and paste together DNA molecules at will, regardless of the source of the molecules. Reason (R): DNA fragments can be manipulated using restriction endonucleases and DNA ligases. Which of the following is correct?
(a)Both A and R are individually true and R is the correct explanation of A
(b)Both A and R are individually 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 individually true and R is the correct explanation of A
Statement A is true: recombinant-DNA technology allows scientists to cut and join DNA from any source. Restriction endonucleases make precise cuts at specific sequences, while DNA ligases reseal phosphodiester bonds, so statement R is also true and directly explains how A is possible; thus option (a) is correct. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Nuclease?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2001 Science & Technology question?▼
The correct answer is option (a): Both A and R are individually 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 2001, GS Paper 1, as Question 124. 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.