The Heme Portion of Hemoglobin Contains Iron That Binds Reversibly

Multiple Choice

The heme portion of hemoglobin contains iron that binds reversibly with oxygen. In addition to oxygen and carbon dioxide transport, hemoglobin functions in blood pressure regulation by ferrying nitric oxide throughout the body.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The second statement is true; the first is false.