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Question

Which of the following gives blood its reddish colour?


Your Answer
A
Deoxygenated haemoglobin
Your Answer
B
Haemoglobin in any form
Correct Answer
C
Oxygenated haemoglobin
Your Answer
D
The subunits of haemoglobin

Solution

The correct option is D Oxygenated haemoglobin
Haemoglobin is a protein made of four subunits, each of which can carry one molecule of oxygen. Oxygenated haemoglobin gives blood the red colour, while deoxygenated haemoglobin gives it a bluish tinge, as can be seen in your veins.

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