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In alcoholic fermentation

1. oxygen is the electron acceptor
2. triose phosphate is the electron donor while acetaldehyde is the electron acceptor
3. triose phosphate is the electron donor while pyruvic acid is the electron acceptor
4. there is no electron donor

Correct answer: triose phosphate is the electron donor while acetaldehyde is the electron acceptor

Solution

During alcoholic fermentation, electrons ultimately come from triose phosphate-derived NADH and are transferred to acetaldehyde. This reduces acetaldehyde to ethanol, so triose phosphate is the electron donor and acetaldehyde is the electron acceptor.

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