Which statement about human fetal hemoglobin is true?
A) Its molecules become saturated with O2 at higher PO2 values than those of adults.
B) It has a higher affinity for O2 than does adult hemoglobin.
C) It has more than four polypeptide chains, so one hemoglobin molecule can carry more than four O2 molecules.
D) Its O2-binding/dissociation curve is shifted to the right of the curve for adults.
E) It has a higher affinity for 2,3-bisphosphoglyceric acid (BPG) than does adult hemoglobin.
Correct Answer:
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