All of the following statements about the conversion of hemoglobin from taut to relaxed forms are correct, EXCEPT
A) additional inter-subunit salt bridges are formed.
B) affinity for molecular oxygen increases.
C) the subunits move relative to one another.
D) BPG is excluded from the central cavity of the molecule.
E) affinity for carbon dioxide decreases.

Question

Quizplus · Accepted Answer

The conversion of hemoglobin from the taut (T) form to the relaxed (R) form involves a decrease in the number of inter-subunit salt bridges, not an increase. This structural change facilitates the binding of oxygen, which is why the affinity for oxygen increases, subunits move relative to one another, BPG is excluded from the central cavity, and the affinity for carbon dioxide decreases.

All of the Following Statements About the Conversion of Hemoglobin