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What is the correct order for Respiration?

  • A.Electron transport chain → Krebs cycle → glycolysis
  • B.Glycolysis → Krebs cycle → electron transport chain
  • C.Glycolysis → electron transport chain → Krebs cycle
  • D.Krebs cycle → electron transport chain → glycolysis

Answer: B

Respiration proceeds glycolysis → Krebs cycle → electron transport chain.

Glycolysis splits glucose into pyruvate in the cytoplasm; the Krebs cycle oxidises it fully in the mitochondrial matrix, releasing carbon dioxide and reduced coenzymes; and the electron transport chain uses those to make most of the ATP.

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