Question

When a molecule of NAD (nicotinamide adenine dinucleotide) gains a hydrogen atom (not a proton), the molecule becomes _____.

Answer 1

reduced

Step-by-step explanation:

Nicotinamide adenine dinucleotide is the cofactor which is found in all living cells. It exists in two forms:

• Oxidized form which is abbreviated as NAD⁺
• Reduced form which is abbreviated as NADH.

NAD is involved in the redox reactions in metabolism, carrying the electrons from one reaction to the another. NAD⁺ is oxidizing agent which means that it accepts the electrons from the other molecules and becomes reduced. The reaction forms NADH.