A Constituent of the Flavin Coenzymes Is

Question

A constituent of the flavin coenzymes is
A) sorbitol
B) mannitol
C) xylitol
D) ribitol
E) glycerol

Accepted Answer

Riboflavin, also known as vitamin B2, is a constituent of the flavin coenzymes (such as flavin adenine dinucleotide or FAD and flavin mononucleotide or FMN) and is composed of a ribitol and a flavin molecule. Therefore, the correct answer is ribitol (choice D). Sorbitol, mannitol, xylitol, and glycerol are not constituents of the flavin coenzymes.