Read the following statements about aerobic respiration: 1. Glycolysis occurs in the mitochondria. 2. Krebs' cycle occurs in the mitochondrial matrix. 3. The final electron acceptor in aerobic respiration is oxygen. Which of the above statements are correct?
Only 2 and 3 are correct
Statement 1 – Incorrect: Glycolysis takes place in the cytoplasm of the cell, not the mitochondria. It splits one glucose molecule into two molecules of pyruvate.
Statement 2 – Correct: The Krebs (citric acid / TCA) cycle takes place in the mitochondrial matrix, where pyruvate-derived acetyl-CoA is oxidised to CO₂.
Statement 3 – Correct: In aerobic respiration the electron transport chain ends with oxygen as the final electron acceptor, which combines with electrons and protons to form water.
Hence only statements 2 and 3 are correct.
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