By Benedette Cuffari, M.Sc.Reviewed by Sophia Coveney, B.Sc. Coenzymes are essential components of the many metabolic processes that sustain life on the cellular level. Coenzymes are crucial to mitochondrial metabolic processes. Image Credit: Explode / Shutterstock.com What are coenzymes? A coenzyme is defined as an organic molecule that binds to the active sites of certain enzymes...