Carbon dioxide is first released during aerobic respiration in the
- A. glycolysis of glucose
- B. oxidative decarboxylation of pyruvate
- C. electron transport chain
- D. phosphorylation of ADP
Explanation
Glycolysis only splits glucose into pyruvate without releasing any CO2; the first decarboxylation happens when pyruvate is converted to acetyl CoA. The Krebs cycle then releases the remaining four CO2 molecules per glucose.
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