What is the major role of NAD+?

a. NAD + acts as an electron transporter

b. NAD + catalyzes the addition of a phosphate to the glucose molecule as it enters the cell.

c. NAD + catalyzes the addition of a phosphate to ADP to form ATP

d. NAD + catalyzes the addition of an electron to ADP to form ATP

Option A is the correct answer - NAD + acts as an electron transporter.

Explanation:

NAD + (Nicotinamide Adenine Dinucleotide) is an organic coenzyme like would see below it is involved mostly in biological oxidation and reduction reactions.

Enzymes that use NAD + / NADH uses it for the following functions;

• Catalyzes important step in glycolysis

• Metabolizes alcohol

• Catalyzes reactions connecting glycolysis to the Krebs cycle

• Catalyzes reactions in muscle and liver cells

• Important in fat catabolism

• Catalyzes reactions in the Krebs cycle, aerobic metabolism

• Catalyzes oxidative phosphorylation reactions.

It should be noted that NAD + is functions as the electron transporter in the liver

The correct Answer is A) NAD + acts as an electron transporter.

Explanation:

Nicotinamide Adenine Dinucleotide (NAD+) is an oxidizing agent - it accepts electrons from other molecules and becomes reduced. It function is more like that of a courier, carrying electrons to the cells that need it to produce and store energy.

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 NAD.

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