Q63 / 180 · AIIMS 2003 · Chemistry

Assertion : Haemoglobin is an oxygen carrier. Reason : Oxygen binds as $\mathrm{O}_2^{-}$to $\mathrm{Fe}$ of haemoglobin.

  • A
    If both assertion and reason are true and the reason is the correct explanation of the assertion
  • B
    If both assertion and reason are true and the reason is not the correct explanation of the assertion
  • Correct answer
    C
    If assertion is true but reason is false
  • D
    If both assertion and reason are false.

Solution

Haemoglobin is the oxygen carrier in the human blood. It consists of four subunits and one molecule of haemoglobin can carry 4 molecules of $\mathrm{O}_2 . \mathrm{O}_2$ binds to $\mathrm{Fe}$ of heme part.

Hence, the correct answer is option: 'C'.

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