Which of the following are coenzymes?a. Zn2+b. NADc. ATPd. All of the above
Question
Which of the following are coenzymes?a. Zn2+b. NADc. ATPd. All of the above
Solution
The correct answer is b. NAD.
Here's why:
a. Zn2+ is a cofactor, not a coenzyme. Cofactors are non-protein chemical compounds or metallic ions that are required for a protein's biological activity to happen.
b. NAD (Nicotinamide adenine dinucleotide) is a coenzyme. Coenzymes are organic non-protein molecules that bind with the protein molecule (apoenzyme) to form the active enzyme (holoenzyme).
c. ATP (Adenosine triphosphate) is not a coenzyme but rather a molecule that carries energy within cells. It is the main energy currency of the cell.
So, the correct answer is b. NAD.
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