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NDA 1 2025 GAT, question 106

Topic: Biology

Q106

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

  1. (a) ATP
  2. (b) PyruvateCorrect answer
  3. (c) Ethanol
  4. (d) Glucose

Solution.

Answer: (b) Pyruvate

  1. Glucose first breaks down through glycolysis into pyruvate.
  2. In the lactate-producing pathway, pyruvate is reduced to lactate, regenerating NAD⁺ so glycolysis can continue.
  3. Thus pyruvate is the immediate precursor; glucose is an earlier starting material.