Apentix/AP Biology/Unit 3: Cellular Energetics/Question
AP Biologyeasymcq1 pt

Which statement correctly summarizes the net result of glycolysis in the cytosol?

A.One glucose molecule becomes two pyruvate molecules, with a net gain of two ATP and two NADH.
B.One glucose molecule becomes two acetyl-CoA molecules, yielding six NADH and two FADH2.
C.One glucose molecule becomes two lactate molecules under every condition.
D.One glucose molecule becomes carbon dioxide and water directly.

Explanation

Core Concept

Glycolysis splits glucose into two three-carbon sugars and ends with two pyruvate. Four ATP form in the payoff phase, but two were invested earlier, leaving a net of two ATP, plus two NADH from the oxidation step. All ten reactions occur in the cytosol and need no oxygen, which is why glycolysis proceeds in aerobes and anaerobes alike.

Correct Answer

AOne glucose molecule becomes two pyruvate molecules, with a net gain of two ATP and two NADH.

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