Question : Which one of the following is the respiratory pigment in man?
Option 1: Haemocyanin
Option 2: Hemerythrin
Option 3: B-Carotene
Option 4: Haemoglobin
Correct Answer: Haemoglobin
Solution : The correct answer is Haemoglobin.
Haemoglobin is the red-coloured pigment present in human red blood cells. It is an iron-containing oxygen transport protein which aids in respiration and carries oxygen to various body organs. Haemoglobin has four binding sites for the oxygen molecules. The normal Haemoglobin level in males is 14 to 18 g/dl and that for females is 12 to 16 g/dl.
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