Question

Coenzymes FMN and FAD are derived from

• A. Vitamin $C$
• B. Vitamin $B_6$
• C. Vitamin $B_1$
• D. Vitamin $B_2$

Answer 1

The correct option is D Vitamin $B_2$

Cofactor is a non protein part of the enzyme. It can be metal ions or the organic chemical. The cofactors which are organic chemicals are known as coenzyme. These are loosely attached to the apoenzyme. Vitamins acts as a coenzyme and activates the protein part of enzyme. Vitamin B${}_2$ complex like flavin (FMN) acts as a prosthetic group of the protein. FAD gets reduced to FADH${}_2$ by addition of hydrogen ion and two electron. The FADH${}_2$ helps in redox reaction during metabolic process. In electron transport chain, FADH${}_2$ breaks to form FAD+ and releases two electron which passes to electron carriers. FMN also acts as a prosthetic group and a strong oxidizing agent.

So, the correct answer is option D.