If niacin is not available for the coenzyme nicotinamide adenine dinucleotide (NAD), which of the following would occur to the reaction that requires NAD? Check all that apply.
A. It is not possible to predict what will happen
B. The enzymatic reaction will still be able to proceed at a regular rate
C. NAD would use another B vitamin
D. The enzymatic reaction cannot proceed
Answer: D
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