The net ATP gain from one glucose molecule in aerobic respiration is 38 ATP. It includes ATP produced in glycolysis, link reaction, TCA cycle and by oxidative phosphorylation in the electron transport system from oxidising NADH and FADH2, which produces 3 ATP and 2 ATP, respectively.
- Glycolysis – 2 ATP and 2 NADH
- Link reaction (pyruvate to acetyl CoA) – 2 NADH
- TCA cycle – 2 ATP, 6 NADH and 2 FADH2
- Electron transport chain – 34 ATP ( 2 NADH from glycolysis, 2 NADH from link reaction, 6 NADH and 2 FADH2 from TCA cycle)
Fermentation – During fermentation, there is a net gain of only 2 ATP due to partial oxidation of glucose. Oxidation of NADH to NAD+ is very slow during fermentation.
- Why the Number of ATP is Not Known Exactly?
- Do All Animals Use ATP?
- What Are the Parts of ATP?
- How Many ATP Are Produced in Glycolysis and TCA Cycle?
- What Is the Primary Role of the TCA Cycle in the Production of ATP?
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