Question

Lactic acid fermentation does not produce

• A. ATP.
• B. CO${}_2$ and NADH.
• C. Lactate.
• D. NAD${}^{+}$.

Answer 1

The correct option is B CO${}_2$ and NADH.

In lactic acid fermentation, the 3-carbon pyruvate is converted to the 3-carbon lactic acid. Also NAD${}^{+}$ is regenerated in the process, allowing glycolysis to continue to make ATP in anaerobic conditions. Hence lactate and NAD${}^{+}$ are the direct products and ATP is the indirect product of lactic acid fermentation. NADH act as a reducing agent here, while CO${}_2$ is a product of alcohol fermentation.