Discussion
The essential function of fermentation is to ________.
Answer: A
Correct answer: regenerate NAD+ so that glycolysis can continue
Glycolysis needs a supply of oxidised NAD+, and without a terminal electron acceptor the cell cannot regenerate it through the electron transport chain. Fermentation solves this by reducing pyruvate or a derivative, so the ATP yield stays at the 2 from glycolysis.
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