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________ (FAD) is a molecule similar to NAD⁺ in function, but it is a lower-energy coenzyme.

a. Flavin adenine dinucleotide
b. Flavin mononucleotide
c. Nicotinamide adenine dinucleotide
d. Adenosine triphosphate

User Tspauld
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1 Answer

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Final answer:

The correct answer is a. Flavin adenine dinucleotide (FAD). It is a coenzyme similar to NAD⁺, involved in several redox reactions, and is derived from vitamin B₂.

Step-by-step explanation:

Flavin adenine dinucleotide (FAD) is a molecule similar to NAD⁺ in function, but it is a lower-energy coenzyme. The correct answer is a. Flavin adenine dinucleotide. FAD is a coenzyme involved in redox reactions within cells. It is composed of two nucleotides: adenosine diphosphate (ADP) and a second nucleotide derived from riboflavin (vitamin B₂). FAD can exist in two states: the oxidized form, FAD, and the reduced form, FADH₂.

It functions similarly to NAD⁺ (Nicotinamide adenine dinucleotide) in that it is involved in the transfer of electrons during cellular respiration. However, FAD is a more versatile coenzyme that can accept and donate electrons in a variety of oxidation-reduction reactions, significantly contributing to the energy extraction from sugars.

User Phi
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