If fermentation pathways follow glycolysis, A) CO₂ will be one of the products as pyruvate is converted to lactate. B) the two NADH molecules produced during glycolysis will (depending on the organism) be used to reduce pyruvate to either lactate or ethanol and CO₂. C) ATP will be required to convert pyruvate to either lactate or ethanol and CO₂. D) oxidative phosphorylation occurs either on the plasma membrane or on derivatives of the plasma membrane. E) none of these will occur.

Question

Quizplus · Accepted Answer

The two NADH molecules produced during glycolysis can be used to reduce pyruvate to either lactate or ethanol and CO2. This is a common pathway in many organisms during anaerobic conditions. Option A is incorrect because lactate is produced from pyruvate in the presence of NADH, not CO₂. Option C is incorrect because ATP is not required for this step, but it is produced during glycolysis. Option D is incorrect because oxidative phosphorylation occurs in the mitochondria, not on the plasma membrane. Option E is incorrect because B is correct.

If Fermentation Pathways Follow Glycolysis