All of the Following Statements Regarding the Interaction of Hemoglobin

Multiple Choice

All of the following statements regarding the interaction of hemoglobin with oxygen are true EXCEPT

A) in Hb A, each heme prosthetic group is capable of reversibly binding one oxygen molecule.
B) the oxygen molecule binds to the heme prosthetic group on the surface opposite to that occupied by the F8 - His.
C) the effect of oxygenation on a heme prosthetic group is such as to push the F8 - His farther from the plane of the heme ring.
D) the reversible binding of an oxygen molecule to a heme prosthetic group requires that the iron of the heme be in the divalent state.
E) oxygenated hemoglobin is a stronger acid than deoxygenated hemoglobin.