Which of the following metals is associated with hemoglobin?

Alluminium

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Iron

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Potassium

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Calcium

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Solution

The correct option is B Iron
Haemoglobin is a conjugated protein. It consists of a basic protein globin joined to a non-protein group heme, hence the name haemoglobin. Heme is an iron-porphyrin ring. Thus option B is the correct answer.

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