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

During lactic acid fermentation, what directly allows glycolysis to continue producing its net 2 ATP per glucose?

A.It adds another substrate-level phosphorylation step after glycolysis
B.It regenerates NAD+, allowing glycolysis to continue
C.It transfers electrons from lactate directly to molecular oxygen
D.It causes mitochondria to produce extra ATP during fermentation

Explanation

Core Concept

Glycolysis itself yields a net 2 ATP per glucose. Fermentation does not produce those ATP; its key role is to oxidize NADH back to NAD+ so glycolysis can continue.

Correct Answer

BIt regenerates NAD+, allowing glycolysis to continue

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