Multiple choice

Which of the following minerals helps in the formation of haemoglobin pigment in red blood cells?

  1. Iron

  2. Phosphorus

  3. Potassium

  4. Magnesium
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A Correct answer
Explanation

Iron is the central component of haemoglobin, the pigment that gives red blood cells their red colour and enables oxygen transport. Each haemoglobin molecule contains four iron atoms that bind to oxygen molecules. Phosphorus, potassium and magnesium are essential minerals but they do not form part of haemoglobin structure.

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