Multiple Choice
Why are phosphate groups added to glucose during the first phase of glycolysis?
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8. Respiration
Glycolysis
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What are the net products of glycolysis?
A
4 ATP, 2 NADH, and 2 pyruvate molecules
B
2 ATP, 4 NADH, and 2 pyruvate molecules
C
2 ATP, 2 NADH, and 4 pyruvate molecules
D
2 ATP, 2 NADH, and 2 pyruvate 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 glycolysis involves a series of ten enzymatic reactions, which can be divided into two phases: the energy investment phase and the energy payoff phase.
In the energy investment phase, 2 ATP molecules are used to phosphorylate glucose and convert it into fructose-1,6-bisphosphate, which is then split into two three-carbon molecules.
In the energy payoff phase, these three-carbon molecules are further processed to produce 4 ATP molecules and 2 NADH molecules. However, since 2 ATP were used in the investment phase, the net gain is 2 ATP.
Conclude that the net products of glycolysis are 2 ATP, 2 NADH, and 2 pyruvate molecules, as the initial glucose molecule is split into two pyruvate molecules.
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