Cellular Respiration

Your Acetyl CoA molecule enters the Citric Acid Cycle (Kreb's Cycle) and attaches to metabolites from the previous sequence to form Citrate. You go around for one sequence of the cycle, producing 3 NADH and 1 FADH2 for further use in the cellular respiration process. However, as an oxygen molecule, you go no further. You can either leave the cellular respiration process as one of two CO2 products of the Citric Acid Cycle or continue as a metabolite for another sequence of the Citric Acid Cycle.