Question
Expand the acronym NAD+/NADH. Illustrate their role in biological redox reactions with two suitable examples
Answer :
Word Count : 235
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NAD⁺ stands for Nicotinamide Adenine Dinucleotide in its oxidized form, while NADH represents Nicotinamide Adenine Dinucleotide in its reduced form. They are important coenzymes involved in cellular oxidation–reduction reactions and play a central role in energy metabolism. NAD⁺ acts as an electron acceptor. During metabolic reactions, it accepts two electrons and one proton (hydride ion, H⁻) from a substrate and becomes reduced to NADH. The general reaction is: \mathrm{NAD^+ + 2e^- + H^+ \rightarrow NADH} NADH can later donate these electrons to another molecule and become oxidized
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