Cellular respiration — glycolysis to the electron chain
Glucose to water in four stages with the ATP counted at each: 2 net plus 2 NADH from glycolysis in the cytosol, 2 NADH from the link reaction, 6 NADH, 2 FADH₂ and 2 GTP from two turns of the Krebs cycle, then oxidative phosphorylation at 2.5 ATP per NADH and 1.5 per FADH₂ for a total near 32.
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