AP Biologymediummcq1 pt
Starting from one glucose molecule, what are the NET yields of glycolysis alone?
A.2 pyruvate, 2 ATP, and 2 NADH
B.2 pyruvate, 4 ATP, and 2 NADH
C.2 acetyl-CoA, 2 ATP, and 2 NADH
D.1 pyruvate, 2 ATP, and 2 NADH
Explanation
Core Concept
The early steps of glycolysis spend 2 ATP to prime and cleave glucose into two three-carbon sugars. The payoff steps then generate 4 ATP by substrate-level phosphorylation and reduce 2 NAD+ to 2 NADH. Subtracting the investment leaves a net gain of 2 ATP alongside 2 pyruvate and 2 NADH. Any larger ATP figure would ignore the priming cost.
Correct Answer
A2 pyruvate, 2 ATP, and 2 NADH
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