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WAEC Biology 2000 Question 16

Question 16

Respiration

When a mammal respires anaerobically for a long time

  1. A.pyruvic acid is converted into acetyl COA
  2. B.more energy is released from fats in the body
  3. C.lactic acid accumulates in the muscles
  4. D.the Kreb's cycle is fully completed
Show the answer and explanation

Answer: C (lactic acid accumulates in the muscles)

Explanation

Without enough oxygen, pyruvic acid is turned into lactic acid, which builds up in the muscles and causes fatigue and cramp.