Enzymes are proteins that often use cofactors to speed up chemical reactions. What types of molecules are usually cofactors in enzymatic reactions?
A) ions
B) vitamins
C) both ions and vitamins
D) None of the choices is correct. Cofactors are always proteins.

Question

Quizplus · Accepted Answer

Cofactors can be either ions or vitamins, or sometimes small molecules like coenzymes. They are not always proteins.

Enzymes Are Proteins That Often Use Cofactors to Speed Up