SUMMARY
Let us now review how the overall equation for aerobic respiration is related to the four stages.

Regarding the reactants:

1. Glycolysis uses glucose but does not use water or oxygen.
2. Formation of acetyl-CoA does not use any of the overall reactants.
3. The citric acid cycle uses the six molecules of water but not the six molecules of oxygen.
4. Electron transport and chemiosmosis use the six molecules of oxygen.

Regarding the products:

1. Glycolysis produces two ATPs. It does not produce any CO₂ or H₂O.
2. Formation of acetyl-CoA produces two molecules of CO₂.
3. The citric acid cycle produces two ATPs and the remaining four molecules of CO₂.
4. Electron transport and chemiosmosis produce the 12 molecules of H₂O and 32 to 34 ATPs.

Altogether, a maximum of 36 to 38 ATPs are produced per glucose molecule.

Activity
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