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Question

The cofactor of the enzyme carboxypeptidase is:

Options

A.Flavin

B.Haem

C.Zinc

D.Niacin

Solution

Sol. [Key Concept: Zinc as an enzyme cofactor]

Carboxypeptidase is a metalloenzyme requiring Zn²⁺ for catalytic activity. Haem is a prosthetic group in enzymes such as catalase, and niacin is a precursor of NAD and NADP. Hence, option (3).

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