The oxidation of PGAL during glycolysis yields _ molecules.
Correct answer: B. NADH
- A. ATP
- B. NADH
- C. FADH
- D. ADP
Explanation
During glycolysis, the oxidation of one molecule of 3-phosphoglyceraldehyde (PGAL or G3P) leads to the conversion of NAD+ to NADH. This occurs in the step where PGAL is converted to 1,3-bisphosphoglycerate. This process yields NADH, an important electron carrier for the electron transport chain, making NADH the correct answer. Other options such as ATP and ADP are involved in different steps of glycolysis, but they are not products of PGAL oxidation. FADH2 is not involved in glycolysis.
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About Bioenergetics
Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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