Apentix/AP Biology/Unit 3: Cellular Energetics/Question
AP Biologymediummcq1 pt

During very intense muscle activity, why can lactate fermentation help sustain a high rate of ATP production by glycolysis?

A.It produces more ATP per glucose than aerobic respiration
B.It regenerates NAD+, allowing rapid glycolysis to continue
C.It causes mitochondria to stop functioning for the rest of the exercise
D.It converts accumulated lactate directly into ATP

Explanation

Core Concept

Rapid glycolysis requires a continuing supply of NAD+. Converting pyruvate to lactate oxidizes NADH back to NAD+, allowing glycolysis to continue at a high rate when oxidative pathways are not reoxidizing NADH quickly enough.

Correct Answer

BIt regenerates NAD+, allowing rapid glycolysis to continue

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