Multiple Choice
Which of the following best describes the primary function of the first half of glycolysis?
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8. Respiration
Glycolysis
Multiple Choice
What is the net yield of ATP molecules produced per molecule of glucose during glycolysis?
A
8 ATP
B
6 ATP
C
2 ATP
D
4 ATP
Verified step by step guidance1
Understand the process of glycolysis: Glycolysis is the first step in cellular respiration, where one molecule of glucose (C₆H₁₂O₆) is broken down into two molecules of pyruvate in the cytoplasm. This process generates ATP and NADH.
Identify the ATP production during glycolysis: Glycolysis involves substrate-level phosphorylation, which directly produces ATP. Specifically, 4 ATP molecules are generated during the energy payoff phase.
Account for ATP consumption: During the energy investment phase of glycolysis, 2 ATP molecules are consumed to phosphorylate glucose and its intermediates, preparing them for subsequent reactions.
Calculate the net ATP yield: The net yield of ATP is determined by subtracting the ATP consumed from the ATP produced. Use the formula: .
Conclude the net yield: After performing the calculation, you will find that the net yield of ATP molecules per molecule of glucose during glycolysis is 2 ATP.
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