What do alcohol fermentation, acetyl CoA formation, and the Krebs cycle have in common?

All three processes release carbon dioxide. Alcohol fermentation produces CO₂ as pyruvate is converted into ethanol, acetyl CoA formation releases CO₂ when pyruvate is converted to acetyl CoA, and the Krebs cycle releases CO₂ as it breaks down carbon compounds. They do not all produce ATP; acetyl CoA formation does not directly make ATP.

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