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In glycolysis, during oxidation electrons are removed by

1. ATP
2. glyceraldehyde-3-phosphate
3. NAD⁺
4. molecular oxygen

Correct answer: NAD⁺

Solution

During glycolysis, glyceraldehyde-3-phosphate is oxidized and the electrons are transferred to NAD⁺, reducing it to NADH. ATP is an energy currency, and molecular oxygen is not the direct electron acceptor in glycolysis.

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