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Percentage Composition

In which stat...

Question

In which state iron is present in haemoglobin?

Unionic

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F e^{2 +}

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f e^{3 +}

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None of the above

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Solution

The correct option is B $F e^{2 +}$
Hemoglobin bound iron remains in the ferrous(Fe2+) state during oxygen binding, transport and release. When hemoglobin bound iron is oxidized to ferric(Fe3+) iron, it cannot transport oxygen.

So, the correct answer is 'Fe2+'.

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F e | F e^{2 +} | | F e^{3 +} | F e

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F e^{3 +} + e^{-} \to F e^{2 +}

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