Which Co-Enzyme is the Most Versatile Electron Acceptor in the Cell

Question

Which co-enzyme is the most versatile electron acceptor in the cell?
A)Acetyl Co-A
B)FAD
C)NAD⁺
D)ATP
E)CytC

Accepted Answer

NAD⁺ (nicotinamide adenine dinucleotide) is a co-enzyme that serves as an electron acceptor in many metabolic reactions, including glycolysis and the citric acid cycle. It is involved in both oxidative and reductive reactions, making it a versatile electron carrier in the cell. NAD⁺ can accept two electrons and a proton, becoming reduced to NADH, which can then donate those electrons and a proton to other molecules in subsequent reactions. FAD (flavin adenine dinucleotide) also serves as an electron acceptor in certain metabolic reactions, but its role is more specialized and limited compared to NAD⁺. Acetyl Co-A, ATP, and CytC are not electron acceptors.