4.
Alcohol dehydrogenase (ADH) requires oxidized nicotinamide adenine dinucleotide (NAD+) for catalytic activity. In the reaction catalyzed by ADH, an alcohol is oxidized to an aldehyde as NAD+ is reduced to NADH and dissociates from the enzyme. The NAD+ is functioning as a:
A:
Apoenzyme
B:
Coenzyme-cosubstrate
C:
Coenzyme-prosthetic group
D:
Cofactor
The answer is:
B
