This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Physiology
Myoglobin binds with 
Select and explain. 
A. 1 mol of oxygen per mol, B. 2 mol of oxygen per mol, C. 3 mol of oxygen per mol, D. 4 mol of oxygen per mol
A: 1 mol of oxygen per mol
Answer: A: 1 mol of oxygen per mol 
Explanation: Myoglobin is specialized for sustained muscular contraction. It has only one heme group and does not show Bohr effect.