Biology 9700 · AS & A Level · Mode of action of enzymes

Mode of action of enzymes — practice question

Which main reaction takes place in the blood capillaries at the gas-exchange surface of a human lung?

  • ACarbonic acid dissociates into carbon dioxide and hydrogen ions.
  • BCarbonic anhydrase converts carbon dioxide into hydrogencarbonate ions.
  • CCarbon dioxide combines with haemoglobin to form carbaminohaemoglobin.
  • DCarbon dioxide is produced from hydrogencarbonate ions by carbonic anhydrase.

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