Question

What is the main constituent of haemoglobin?
(a)=Calcium
(b)=Oxygen
(c)=Carbon dioxide
(d)=Iron​

Answer 1

Answer:

Hemoglobin is the most important component of red blood cells. It is composed of a protein called heme, which binds oxygen. In the lungs, oxygen is exchanged for carbon dioxide.

Abnormalities of an individual's hemoglobin value can indicate defects in the normal balance between red blood cell production and destruction. Both low and high values can indicate disease states.

Answer 2

HEMOGLOBIN:

• Option (D) IRON is the right answer.
• Hemoglobin, the red pigment in the blood, consists of a protein component and the iron complex of a porphyrin derivative: Hemoglobin= globin(protein) + haemochromogen( Fe(II) complex).
• During the breathing process, oxygen attaches loosely to the iron ion, and the oxyhemoglobin thus formed surrenders its oxygen in the body and reverts back to hemoglobin.
• Outside the body the iron converts to the trivalent form. Hemoglobin binds carbon dioxide more strongly than oxygen, its color weakening to cherry red, hence the pink complexion of victims of carbon monoxide poisoning.
• One degradation products of hemoglobin is the brown bile pigment bilirubin. Another is green biliverdin the result of breakdown by bilirubin.
• Hemoglobin detection Hemoglobin (Hb) composed of four protein chains in red blood cells carries oxygen from blood to organs and tissue.
• Hemoglobin has a quaternary structure. It consists of two pairs of different proteins, designated the alpha and beta chains.
• Advantages of hemoglobin adducts over DNA adducts  include the relative ease with which hemoglobin can be obtained in the quantity, the lack of repair of adducts, relatively long lifetime of red blood cells in human is 120 days.