18. Which of the following statement about coenzymes and prosthetic groups is not correct? (A) coenzyme is an organic non-protein compound that binds with an enzyme to catalyze a reaction. (B) Coenzymes are bound only momentarily to the enzyme during the course of the reaction. (C) Prosthetic group binds to the enzyme to form the active holoenzyme. (D) Pyridoxal-5'-phosphate is the prosthetic group of dehydrogenases. (E) NAD*/NADH and NADP*/NADP are classified as coenzymes of the enzymes.