What is the role of hemoglobin's heme group in the transport of oxygen?

A To bind and transport carbon dioxide
B To facilitate the binding of oxygen to the globin chains
C To act as an antioxidant, protecting the red blood cell from damage
D To bind and transport oxygen from the lungs to the tissues ✓
The heme group in hemoglobin is responsible for binding and transporting oxygen from the lungs to the tissues.
Guyton and Hall Textbook of Medical Physiology
Hematology Hematology: Hemoglobin and Oxygen Transport Hematology: Hemoglobin and Oxygen Transport Easy MEDICAL Confidence: high