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Which one of the following is the respiratory pigment in man ?
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- Haemocyanin
- Haemoerythrin
- b-Carotene
- Haemoglobin
Correct Option: D
A respiratory pigment is a molecule, such as hemoglobin in humans, that increases the oxygencarrying capacity of the blood. The four most common invertebrate respiratory pigments are hemoglobin, haemocyanin, haemerythrin and chlorocruorin.
