NEET 2024 · BiologyEnzymesPrevious Year Question
The cofactor of the enzyme carboxypeptidase is
Answer: (D) Zinc. Answer: (D) Zinc.
- A.Niacin
- B.Flavin
- C.Haem
- D.Zinc✓
Correct Answer
(D) Zinc
Solution & Explanation
Answer: (D) Zinc. Solution: A number of enzymes require metal ions as cofactors that form coordination bonds at the active site; NCERT gives zinc as the cofactor for the proteolytic enzyme carboxypeptidase. Niacin and flavin are vitamin-derived coenzyme components and haem is the prosthetic group of catalase/peroxidase, so only zinc fits. NCERT Reference: Ch 9, p.118, line ~19 — "zinc is a cofactor for the proteolytic enzyme carboxypeptidase."
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