JEE Main Chemistry question

[Manipal 2007] The correct statement in respect of protein haemoglobin is that it

(A)Functions as a catalyst for biological reactions
(B)Maintains blood sugar level
(C)Acts as an oxygen carrier in the bloodCorrect
(D)Forms antibodies and offers resistance to diseases

Answer: (C)

Solution

Haemoglobin, an iron-containing conjugated protein in red blood cells, binds molecular oxygen at its four Fe²⁺ centres in the lungs and releases it to the tissues, acting as the body's oxygen carrier. It is not an enzyme (catalyst),

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Question ID VK-150635