What is the primary function of the heme group in hemoglobin?

A To facilitate the binding of oxygen to hemoglobin
B To regulate the pH of the blood
C To provide structural support to the hemoglobin molecule
D To catalyze the conversion of carbon dioxide to oxygen
The heme group is a critical component of hemoglobin, responsible for binding oxygen and facilitating its transport to tissues.
Guyton and Hall Textbook of Medical Physiology
Hematology Hematology: Hemoglobin and Oxygen Transport Hematology: Hemoglobin and Oxygen Transport Easy MEDICAL Confidence: high