What does not happen to a carbon dioxide molecule once it enters the bloodstream? A)It is converted to a molecule of carbonic acid. B)It binds to the protein portion of hemoglobin molecules within red blood cells. C)It dissolves in plasma. D)It is converted by carbonic anhydrase. E)It binds to heme groups in hemoglobin.

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Quizplus · Accepted Answer

Carbon dioxide does not bind to heme groups in hemoglobin. It can either dissolve in plasma or be converted to carbonic acid and then bind to the protein portion of hemoglobin within red blood cells. This conversion is catalyzed by carbonic anhydrase.

What Does not Happen to a Carbon Dioxide Molecule Once