A cell deprived of oxygen continues to produce some ATP through:

High-School-Ap Biology

Fermentation following glycolysis

✓ Correct Answer

Explanation

When O2 is absent, the ETC stalls because Complex IV has no terminal electron acceptor. Cells regenerate NAD+ via fermentation (lactic-acid fermentation in animals, alcohol fermentation in yeast) so glycolysis can continue producing 2 ATP per glucose by substrate-level phosphorylation.

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