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Question

Which essential element is found in haemoglobin, porphyrins and cytochromes?

A
Magnesium
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B
Manganese
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C
Copper
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D
Iron
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Solution

The correct option is D Iron
Iron plays important role in biology in haemoglobin, porphyrins forming complexes with molecular oxygen and cytochromes .
So, the correct option is D. ( Iron )

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