Which of the Following Best Describes What Happens When Hemoglobin

Multiple Choice

Which of the following best describes what happens when hemoglobin binds bis phosphoglyceric acid (BPG) ?

A) Binding of BPG leads to tighter binding of oxygen.
B) Binding of BPG allows maternal (adult) Hb to bind oxygen more tightly than fetal Hb.
C) Binding of BPG is important to the allosteric nature of hemoglobin
D) Binding of BPG causes the subunits of hemoglobin to separate.