All of the following are a coenzyme or a precursor of a coenzyme EXCEPT:
A) thiamin.
B) riboflavin.
C) retinol.
D) niacin.
E) biotin.

Question

Quizplus · Accepted Answer

Retinol is a precursor of retinoids, which have hormone-like functions in the body but are not considered coenzymes or precursors of coenzymes. Thiamin, riboflavin, niacin, and biotin are all B vitamins that function as coenzymes or precursors of coenzymes.

All of the Following Are a Coenzyme or a Precursor