Final answer:
In the process of fatty acid β-oxidation, acetyl CoA, FADH2, and NADH are produced, while CoA-SH is utilized but not produced. Therefore, the product of fatty acid β-oxidation that is not produced is CoA-SH.
Step-by-step explanation:
The products of fatty acid β-oxidation include acetyl CoA, FADH2, and NADH. The process of β-oxidation involves several steps where the fatty acid chain is progressively shortened, with each cycle removing a two-carbon acetyl unit from the fatty acid to form acetyl CoA. Acyl-CoA undergoes several reactions within this cycle, and one of these is the dehydrogenation by acyl-CoA dehydrogenase, leading to the reduction of FAD to FADH2. This implies that across the various cycles of β-oxidation, multiple molecules of acetyl CoA, FADH2, and NADH are produced.
Coenzyme A (CoA-SH) is the agent for transfer of acetyl groups during fatty acid metabolism but is not produced during the β-oxidation process. Rather, it is utilized as CoA forms part of the acyl-CoA which enters the β-oxidation cycle. Therefore, the correct answer to the student's question, which product is not produced during β-oxidation, is B. CoA-SH.