Stage 1 - glycolysis, Site: Cytoplasm, 1 molecule glucose→ 2 molecules pyruvic acid, -2ATP, +4ATP, Net: 2 ATP, Stage 2 - Krebs cycle, Site: Mitochondrial matrix, Pyruvic acid → carbon dioxide, +2ATP, Stage 3 - Electron Transport Chain, Site: Inner membrane of the mitochondria, High-energy electrons from the first two stages are used to convert ADP to ATP, +32 ATP

Cellular respiration (simplified)

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