Which of the following statements is correct?
(A) At 10 mm Hg partial pressure, hemoglobin binds oxygen but myoglobin does not.
(B) At 20 mm Hg partial pressure, myoglobin and hemoglobin bind oxygen in equal amounts.
(C) At 40 mm Hg partial pressure, myoglobin has a greater affinity for oxygen than hemoglobin has.
(D) At 80 mm Hg partial pressure, myoglobin binds twice as much oxygen as hemoglobin binds.
Ans: (C) At 40 mm Hg partial pressure, myoglobin has a greater affinity for oxygen than hemoglobin has.
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