The processes 'FADH2 accepts two electrons to form FAD', 'Pyruvate is converted into acetyl-CoA' and 'Carbon dioxide, NADH, and FADH2, and ATP are reactants' do NOT OCCUR during the Krebs cycle.
- Cellular respiration has three stages: glycolysis, the Krebs cycle (i.e., the citric acid cycle) and oxidative phosphorylation.
- During glycolysis, pyruvate is converted into acetyl-CoA by an enzyme called pyruvate dehydrogenase.
- The Krebs cycle is a group of reactions that produce CO2, ATP, and reduced forms of NADH and FADH2, thereby these molecules are products instead of reactants.
- During the oxidative phosphorylation, the flow of electrons from FADH2 and NADH to O2 via a series of protein complexes is coupled to the generation of an electrochemical proton gradient, which is subsequently used to generate ATP.
In conclusion, the processes 'FADH2 accepts two electrons to form FAD', 'Pyruvate is converted into acetyl-CoA' and 'Carbon dioxide, NADH, and FADH2, and ATP are reactants' do NOT OCCUR during the Krebs cycle.
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