Multiple choice

Haemoglobin contains

  1. Fe2+

  2. Na+

  3. Mg2+

  4. Ca2+

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

It is a red protein that is responsible for transporting oxygen in the blood of vertebrates. Its molecule comprises four subunits, each containing an iron atom bound to a haem group.

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