Multiple choice general knowledge science & technology

The main constituent of hemoglobin is

  1. Chlorine

  2. Iron

  3. Calcium

  4. Carbon
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hemoglobin contains iron (Fe) in its heme groups, enabling it to bind and transport oxygen throughout the body. Each hemoglobin molecule has four iron atoms, allowing it to carry four oxygen molecules. Iron deficiency leads to anemia due to reduced oxygen-carrying capacity. Chlorine, calcium, and carbon are not structural components of hemoglobin.

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