Which of the Following is an Active Enzyme

Question

Which of the following is an active enzyme?
A) apoenzyme
B) cofactor
C) coenzyme
D) holoenzyme
E) subtrate

Accepted Answer

A holoenzyme is an active enzyme that contains both a protein component called apoenzyme and a non-protein component called cofactor or coenzyme, which are necessary for the enzyme's activity. The substrate is the substance that the enzyme acts upon, so it is not an active enzyme itself.