A coenzyme is
A)an ionic cofactor that interacts with an enzyme to inhibit it.
B)a protein cofactor that interacts with an enzyme to inhibit it.
C)an ionic cofactor that interacts with an enzyme to allow it to work.
D)a protein cofactor that interacts with an enzyme to allow it to work.
E)a nonprotein organic cofactor that interacts with an enzyme to allow it to work.

Question

Quizplus · Accepted Answer

The definition of a coenzyme is a nonprotein organic cofactor that interacts with an enzyme to allow it to work. Choice A and B are incorrect because ionic or protein cofactors that interact with an enzyme to inhibit it are called inhibitors. Choice C is incorrect because an ionic cofactor alone cannot activate an enzyme, it needs a nonprotein cofactor such as a coenzyme.

A Coenzyme Is