How many 3-carbon molecules of lactic acid result from glycolysis?

Glycolysis is a metabolic pathway that breaks down glucose (a 6-carbon molecule) into two molecules of pyruvate, each containing three carbon atoms. This process occurs in the cytoplasm of the cell and can function under both aerobic and anaerobic conditions.

When glycolysis is completed, the end product is two molecules of pyruvate, which can then be converted into lactic acid when oxygen levels are low (i.e., during anaerobic conditions). Each of these pyruvate molecules is a 3-carbon compound, leading to the conclusion that from one molecule of glucose, glycolysis produces two 3-carbon molecules of lactic acid.

Therefore, in the context of glycolysis, the correct answer about the number of 3-carbon lactic acid molecules that result from the breakdown of glucose is two.