AP BIOLOGY

Detailed explanation-1: -This is found in two forms in cells: NAD+ is an oxidizing agent – it accepts electrons from other molecules and becomes reduced. This reaction forms NADH, which can then be used as a reducing agent to donate electrons. These electron transfer reactions are the main function of NA D + .

Detailed explanation-2: -The NAD coenzyme acts as a hydrogen acceptor in oxidation-reduction reactions. The electron transport chain in cellular respiration is responsible for energy production and is an excellent illustration of NAD’s involvement in redox reactions.

Detailed explanation-3: -The best-known and most common hydrogen acceptor is nicotinamide adenine dinucleotide (NAD): NAD+ + 2e-+ 2H+ <> NADH + H+ or, for example NAD+ + R-CHOH-R’ <> NADH + H+ + R-CO-R’ One of the protons is bound directly to the nicotine amide ring, while the other remains in solution.

Detailed explanation-4: -NADH: High energy electron carrier used to transport electrons generated in Glycolysis and Krebs Cycle to the Electron Transport Chain. FADH2: High energy electron carrier used to transport electrons generated in Glycolysis and Krebs Cycle to the Electron Transport Chain.

Detailed explanation-5: -NADP, NAD and FAD are coenzyme formed from vitamins and work as electron acceptor in cellular metabolism.