What Term Describes an Enzyme Without Its Required Cofactor

Question

What term describes an enzyme without its required cofactor?
A) holoenzyme
B) coenzyme
C) isozyme
D) apoenzyme
E) None of the answers is correct.

Accepted Answer

An apoenzyme is the term used to describe an enzyme without its required cofactor. When combined with its cofactor, it becomes a holoenzyme, which is the active form.