In which stage(s) of cellular respiration is acetyl CoA a reactant?Group of answer choicespyruvate oxidationcitric acid cycleglycolysisoxidative phosphorylationNext
Question
In which stage(s) of cellular respiration is acetyl CoA a reactant?Group of answer choicespyruvate oxidationcitric acid cycleglycolysisoxidative phosphorylationNext
Solution
Acetyl CoA is a reactant in two stages of cellular respiration:
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Pyruvate Oxidation: In this stage, pyruvate (produced from glycolysis) is converted into Acetyl CoA. This is a preparatory step for the citric acid cycle.
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Citric Acid Cycle (also known as Krebs Cycle or TCA Cycle): In this stage, Acetyl CoA combines with a four-carbon molecule, oxaloacetate, to start the cycle. The cycle results in the production of ATP, NADH, and FADH2, which are used in the next stage of cellular respiration, oxidative phosphorylation.
Acetyl CoA is not directly involved in glycolysis or oxidative phosphorylation.
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