NEET 2016 Phase 1 · BiologyPrevious Year Question
Which of the following is a restriction endonuclease?
Answer: (A) Hind II. Answer: (A) Hind II Solution: Restriction endonucleases are enzymes that cut DNA at specific recognition sequences.
- A.Hind II✓
- B.Protease
- C.DNase I
- D.RNase
Correct Answer
(A) Hind II
Solution & Explanation
Answer: (A) Hind II Solution: Restriction endonucleases are enzymes that cut DNA at specific recognition sequences. Hind II was the first restriction endonuclease isolated and characterised; it cuts DNA at a particular point by recognising a specific sequence of six base pairs. Protease, DNase I and RNase are general hydrolytic enzymes (not sequence-specific restriction endonucleases). NCERT Reference: Ch 9, p.165, line(s) 37 — "The first restriction endonuclease–Hind II, whose functioning"
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