Zinc, an essential trace element for most organisms, is present in the active site of the enzyme carboxypeptidase. The zinc most likely functions as ________.
A) a noncompetitive inhibitor of the enzyme
B) an allosteric activator of the enzyme
C) a cofactor necessary for enzyme activity
D) a coenzyme derived from a vitamin

Question

Quizplus · Accepted Answer

Zinc is a cofactor necessary for enzyme activity. It helps in stabilizing the intermediate transition state in the catalytic reaction of the enzyme carboxypeptidase. In the absence of zinc, the enzyme's activity is significantly reduced. Zinc is an essential trace element required for various cellular processes, including gene expression, protein synthesis, and immune function.

Zinc, an Essential Trace Element for Most Organisms, Is Present