Multiple Choice
In glycolysis, ATP molecules are produced directly by which process?
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Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway
Glycolysis 2
Multiple Choice
In the glycolytic pathway (conversion of one molecule of glucose to two molecules of pyruvate), how many molecules of NADH are produced per glucose under aerobic conditions?
A
1 NADH
B
0 NADH
C
4 NADH
D
2 NADH
Verified step by step guidance1
Recall that glycolysis is the metabolic pathway that converts one molecule of glucose into two molecules of pyruvate.
Identify the specific step in glycolysis where NADH is produced: this occurs during the oxidation of glyceraldehyde-3-phosphate to 1,3-bisphosphoglycerate, catalyzed by glyceraldehyde-3-phosphate dehydrogenase.
Note that for each molecule of glucose, glycolysis produces two molecules of glyceraldehyde-3-phosphate, so the NADH-producing step happens twice per glucose molecule.
Calculate the total NADH molecules produced by multiplying the number of NADH molecules produced per glyceraldehyde-3-phosphate oxidation (which is 1) by 2 (because there are two glyceraldehyde-3-phosphate molecules per glucose).
Conclude that the total NADH produced per glucose molecule during glycolysis under aerobic conditions is 2 NADH molecules.
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