Discussion
The acquisition of energy by glucose fermentation requires
Answer: A
Correct answer: substrate-level phosphorylation
Fermentation has no electron transport chain and no external electron acceptor, so all its ATP comes from substrate-level phosphorylation - a phosphate group transferred directly from a high-energy intermediate such as 1,3-bisphosphoglycerate or phosphoenolpyruvate to ADP. That is why the yield is only 2 ATP per glucose.
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