Enzymes which are in an inactive form after the removal of a cofactor or prosthetic group are termed:
A) isozymes
B) holoenzymes
C) zymogens
D) apoenzymes
E) proenzymes

Question

Quizplus · Accepted Answer

Enzymes which are in an inactive form after the removal of a cofactor or prosthetic group are called apoenzymes. Choice A (isozymes) refers to enzymes that have the same function but different structures. Choice B (holoenzymes) refers to enzymes with their cofactors or prosthetic groups attached. Choice C (zymogens) are also called proenzymes, which are inactive precursors of enzymes that require activation by cleavage of a specific peptide bond. Choice E (proenzymes) is the same as zymogens.

Enzymes Which Are in an Inactive Form After the Removal