Final answer:
The main coenzymes used in aerobic cellular respiration are NAD, FAD, and coenzyme A (CoA), with NADH, FADH2, and acetyl CoA being their active forms.
Step-by-step explanation:
The primary coenzymes used in aerobic cellular respiration are nicotinamide adenine dinucleotide (NAD) and flavin adenine dinucleotide (FAD). These coenzymes act as carriers for electrons and protons during various stages of respiration. NAD is transformed into NADH, and FAD is transformed into FADH2, both of which are energy-containing molecules crucial for the generation of adenosine triphosphate (ATP). Another vital coenzyme is coenzyme A (CoA), which forms acetyl CoA by combining with an acetyl group derived from pyruvic acid. CoA is synthesized from vitamin B5, pantothenic acid, and is essential in transferring the acetyl group to the citric acid cycle, also known as the Krebs cycle.