One haemoglobin carries how many molecules of $O_{2}$ ?

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Solution

The correct option is B 4
Haemoglobin is a red coloured iron-containing pigment present in the RBCs. Oxygen can bind with haemoglobin in a reversible manner to form oxyhaemoglobin. Each haemoglobin molecule can carry a maximum of four molecules of oxygen. Binding of oxygen with haemoglobin is primarily related to partial pressure of oxygen. The partial pressure of $C O_{2}$ , hydrogen ion concentration and temperature are the other factors which can interfere with this binding.

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