Hemoglobin can carry oxygen more efficiently than it can carry carbon dioxide because all four polypeptide chains can carry oxygen,but only the beta chain can carry carbon dioxide.

Question

Quizplus · Accepted Answer

Hemoglobin can carry both oxygen and carbon dioxide through its four polypeptide chains, but the binding sites for oxygen and carbon dioxide are different on each chain. The beta chain actually binds oxygen more efficiently, while the alpha chain is responsible for binding carbon dioxide.

Hemoglobin Can Carry Oxygen More Efficiently Than It Can Carry