The vitamin that is part of the coenzymes FAD and FMN is 23:36 Metabolism and Energetics The vitamin that is part of the coenzymes FAD and FMN is a. thiamine. b. riboflavin. c. niacin. d. folic acid (folate). e. cobalamin. Answer: B Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+