Which of the Following Is Correct with Respect to the Redox

question 33

Multiple Choice

Which of the following is correct with respect to the redox pair NAD⁺/NADH?

• A) The nicotinamide ring is a relatively stable aromatic structure.
• B) The nicotinamide ring is a heteroaromatic because it has a noncarbon atom in position 4.
• C) The nicotinamide ring may accept two electrons at carbon 1, becoming a nonaromatic ring.
• D) The reduced, nonaromatic ring of NADH is at a higher energy than the aromatic ring of NAD⁺.
• E) All of the above are correct.

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Definitions:

Cyclopentane

A cyclic alkane with the molecular formula C5H10, characterized by a ring of five carbon atoms, used as a solvent and in the synthesis of rubber.

Cyclohexane

A saturated hydrocarbon with a six-membered ring structure, commonly used as a solvent or chemical precursor in various industrial applications.

Cyclooctane

A saturated hydrocarbon with the chemical formula C8H16, characterized by a ring structure of eight carbon atoms.

Cyclooctane

A cyclic hydrocarbon with the formula C8H16, consisting of a ring of eight carbon atoms.