BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Summary. Flavin adenine dinucleotide (FAD) is an important redox cofactor involved in many reactions in metabolism. The fully oxidized form, FAD, is converted to the reduced form, FADH2 by receiving two electrons and two protons.

Detailed explanation-2: -FADH2 can also be oxidized by the loss of 1 H+ and 1 e− to form FADH. The FAD form can be recreated through the further loss of 1 H+ and 1 e−. FAD formation can also occur through the reduction and dehydration of flavin-N(5)-oxide.

Detailed explanation-3: -NADH and FADH2 are electron-carrying molecules that play a vital role in cellular respiration. NADH is the reduced form of NAD, while FADH2 is the reduced form of FAD. Both molecules are capable of undergoing reduction and oxidation reactions when they receive and release electrons, respectively.

Detailed explanation-4: -Hence, it is a oxidation reaction.