Multiple choice

The main constituent of haemoglobin is

  1. Calcium

  2. Chlorine

  3. Iron

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Iron has long been known to be important for red blood cell function because of its fundmanetal role in the haemoglobin molecule. Haemoglobin is the molecule that carries oxygen to the tissues from the lungs and returns with carbon dioxide from the cells. It is closely related to myoglobin, which is responsible for energy production in the muscles.

Keep practicing — related questions