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The lactic acid that gets accumulated in the muscle cells during rigorous exercise causing muscle cramps is produced from

Options

  1. AATP
  2. BPyruvate
  3. CEthanol
  4. DGlucose

Correct answer

B. Pyruvate

Step-by-step solution

During rigorous exercise, the demand for energy in muscle cells is high, but the supply of oxygen is limited. Under these anaerobic conditions, glucose is first broken down into pyruvate through glycolysis in the cytoplasm. To regenerate NAD ^+ for glycolysis to continue, pyruvate is reduced to lactic acid by the enzyme lactate dehydrogenase. Thus, the lactic acid that accumulates in muscle cells and causes cramps is directly produced from pyruvate. Answer: Pyruvate

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