When electrons are removed from nutrients via an oxidation reaction, the coupled reduction reaction may be

A) NAD+ ? NADH.
B) NADH ? NAD+.
C) FAD ? FADH2.
D) either FAD ? FADH2 or NAD+ ? NADH.
E) either NAD+ ? NADH or NADH ? NAD+.


Answer: D

Biology & Microbiology

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