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AIIMS 2013
Exam
AIIMS
Year
2013
Subject
Botany
Chapter
Mineral Nutrition

AIIMS 2013 · Botany · Mineral Nutrition

What is the oxidation state of iron in haemoglobin?

What is the oxidation state of iron in haemoglobin?

Options

  1. AFe−\mathrm{Fe}^{-}
  2. BFe2+\mathrm{Fe}^{2+}
  3. CFe3+\mathrm{Fe}^{3+}
  4. DFe4+\mathrm{Fe}^{4+}

Correct answer

B. Fe2+\mathrm{Fe}^{2+}

Step-by-step solution

RBCs contain haemoglobin. It has four polypeptide chains and four haem groups attached to it or 4 atoms of iron in ferrous form (Fe2+)\left(\mathrm{Fe}^{2+}\right), thus it can react with 4 molecules of oxygen to form oxyhaemoglobin.
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