Question

level 5 q2 what molecule is produced when muscles start fermentation and causes cramps? a. pyruvic acid b. lactic acid c. ethanol d. methanol diagram showing a metabolic pathway options: a pyruvic acid, b lactic acid, c ethanol, d methanol

Explanation:

When muscles undergo fermentation (anaerobic respiration) due to lack of oxygen, lactic acid is produced. This accumulation of lactic acid in muscles leads to muscle cramps. Pyruvic acid is a product of glycolysis (before fermentation), ethanol is produced in alcoholic fermentation (by yeast, not muscle cells), and methanol is not a product of muscle fermentation.

Answer:

B. Lactic acid