For its activity,carboxypeptidase requires

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(A) The correct answer is $A$. Carboxypeptidase is a digestive enzyme synthesized in the pancreas and secreted into the small intestine. It functions

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zinc

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(A) The correct answer is $A$. Carboxypeptidase is a digestive enzyme synthesized in the pancreas and secreted into the small intestine. It functions as a metalloenzyme and requires $Zn^{2+}$ (zinc) ions as a cofactor for its catalytic activity. This enzyme plays a crucial role in protein digestion by cleaving amino acids from the carboxyl terminus of proteins and peptides. It operates optimally in an alkaline medium and is primarily involved in the conversion of large polypeptides into smaller dipeptides and individual amino acids.

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