Zinc,an Essential Trace Element for Most Organisms,is Required in the Active

Multiple Choice

Zinc,an essential trace element for most organisms,is required in the active site of the enzyme carboxypeptidase in order for the enzyme to function properly.The zinc most likely functions as a(n)

A) competitive inhibitor of the enzyme.
B) noncompetitive inhibitor of the enzyme.
C) allosteric activator of the enzyme.
D) cofactor necessary for enzyme activity.
E) coenzyme derived from a vitamin.