Multiple Choice
Glycolysis produces a net gain of which of the following molecules?
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8. Respiration
Glycolysis
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What is the net gain of ATP molecules produced during glycolysis?
A
4 ATP molecules
B
6 ATP molecules
C
8 ATP molecules
D
2 ATP molecules
Verified step by step guidance1
Understand that glycolysis is the process of breaking down one molecule of glucose into two molecules of pyruvate, which occurs in the cytoplasm of the cell.
Recognize that during glycolysis, a total of 4 ATP molecules are produced through substrate-level phosphorylation.
Note that 2 ATP molecules are consumed in the initial steps of glycolysis to phosphorylate glucose and convert it into fructose-1,6-bisphosphate.
Calculate the net gain of ATP by subtracting the 2 ATP molecules used from the 4 ATP molecules produced, resulting in a net gain of 2 ATP molecules.
Remember that glycolysis also produces 2 NADH molecules, which can be used in the electron transport chain to generate additional ATP, but these are not part of the net ATP gain from glycolysis itself.
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