Total ATP yi - Fermentation Without oxygen, cellular...

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Total ATP yi eld per glucose Conversions NADH produced in the cytoplasm produces two to three ATP by the electron transport system. NADH produced in the mitochondria produces approximately three ATP. FADH 2 adds its electrons to the electron transport system at a lower level than NADH, so it produces approximately two ATP. Glycolysis 2 ATP 2 NADH (= 4 ATP; these are converted to ATP in the mitochondria during cellular respiration) Formation of Acetyl CoA 2 NADH (= 6ATP) Krebs Cycle 6 NADH (= 18 ATP) 2 FADH 2 (= 4 ATP) 2 ATP Total Yield Glycolysis produces 2 ATP; aerobic respiration produces 34 more ATP Pathway Substrate-Level Phosphorylation Oxidative Phosphorylation Total ATP Glycolysis 2 ATP 2 NADH = 4 - 6 ATP 6 - 8 CoA 2 NADH = 6 ATP 6 Krebs Cycle 2 ATP 6 NADH = 18 ATP 2 FADH 2 = 4 ATP 24 TOTAL 4 ATP 32 ATP 36 - 38
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Unformatted text preview: Fermentation Without oxygen, cellular respiration could not occur because oxygen serves as the final electron acceptor in the electron transport system . The electron transport system would therefore not be available. Glycolysis can occur without oxygen. Although glycolysis does not require oxygen, it does require NAD + . Cells without oxygen available need to regenerate NAD + from NADH so that in the absence of oxygen, at least some ATP can be made by glycolysis. To regenerate NAD + from NADH, the electrons from NADH are added to pyruvate to produce alcohol (plants, yeast) or lactate (animals, bacteria). The total ATP yield of fermentation comes from glycolysis; 2 ATP molecules are produced per glucose....
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Total ATP yi - Fermentation Without oxygen, cellular...

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