Glyceraldehyde phosphate is oxidized during glycolysis. What happens to hydrogen atom and the electron that are removed during oxidation?
Correct answer: D. They reduce NAD+
- A. They reduce NADP
- B. They are transferred to pyruvic acid
- C. They are eliminated in the form of methane
- D. They reduce NAD+
Explanation
During glycolysis, specifically in the step where glyceraldehyde 3-phosphate is converted to 1,3-bisphosphoglycerate, NAD+ serves as an electron carrier. It accepts electrons and hydrogen atoms that are removed from glyceraldehyde phosphate, becoming reduced to NADH. This is a crucial step in glycolysis as it contributes to the cell's energy production by providing electrons for the electron transport chain. Option A is incorrect because NADP is not involved in glycolysis. Option B is incorrect because pyruvic acid is formed later in the glycolytic pathway and does not directly accept electrons in this step. Option C is incorrect because methane production is unrelated to glycolysis and is instead a part of anaerobic digestion processes in some microorganisms.
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