This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Muscle, Subject name: Physiology
Which of the following is true about myoglobin? 
Select and explain. 
A. Myoglobin binds to 4 moles of O2 per mole, B. Myoglobin - dissociation curve has parabolic profile, C. Myoglobin - has a high O2 affinity compared to that of hemoglobin, D. Myoglobin - dissociation curve shows bohr effect.
C: Myoglobin - has a high O2 affinity compared to that of hemoglobin
Answer: C: Myoglobin - has a high O2 affinity compared to that of hemoglobin 
Explanation: Features of O2 - MYOGLOBIN DISSOCIATION CURVE 1. Myoglobin dissociation curve has a rectangular hyperbola 2. 1 mole of myoglobin binds to 1 mole of O2 Myoglobin has higher affinity for O2 compared to Hb. (left shift of myoglobin - O2 curve compared to O2 - Hb curve) Because myoglobin is the store of O2, it has rectangular hyperbola curve as it holds O2 for long time.