In alcoholic fermentation,..........

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(B) In alcoholic fermentation,glucose is broken down into pyruvic acid via glycolysis,producing $NADH + H^+$. In the subsequent steps,pyruvic acid is

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Triose phosphate is the electron donor,while acetaldehyde is the electron acceptor.

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(B) In alcoholic fermentation,glucose is broken down into pyruvic acid via glycolysis,producing $NADH + H^+$. In the subsequent steps,pyruvic acid is converted into acetaldehyde,which then acts as the final electron acceptor. Acetaldehyde accepts electrons from $NADH + H^+$ (which originated from the oxidation of triose phosphate during glycolysis) to form ethanol. Thus,triose phosphate acts as the ultimate electron donor,and acetaldehyde acts as the electron acceptor.

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