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(n) a. competitive inhibitor of the enzyme. b. noncompetitive inhibitor of the enzyme. c. coenzyme derived from a vitamin. d. cofactor that is an activator of the enzyme.

Option D) cofactor that is an activator of the enzyme.

Explanation:

A cofactor is a non-organic component (usually a metal) of an enzyme or protein, that enhances its function. Good examples of Cofactors include iron in hemoglobin, zinc in carboxypeptidase.

Zinc at the active site of the enzyme, carboxypeptidase helps it in cleaving off aromatic amino acids.

as a camel goes without food, its hump begins to shrink. its fur prevents the camel from sweating too much.camels store fat in their humps, not water.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation: