In the cell respiration of glucose, lactic acid may be formed during:
A)glycolysis, when oxygen is present
B)glycolysis, when oxygen is not present
C)the Krebs cycle, when oxygen is present
D)the Krebs cycle, when oxygen is not present

Question

Quizplus · Accepted Answer

Lactic acid is formed as a byproduct of anaerobic metabolism during glycolysis when oxygen is not present. If oxygen is present, the pyruvate produced during glycolysis enters the Krebs cycle, leading to the production of ATP via oxidative phosphorylation, and lactic acid is not formed.

In the Cell Respiration of Glucose, Lactic Acid May Be