Question

Erythrocytes are red in colour because of the presence of a protein called __________.

Answer 1

Erythrocytes:

1. Erythrocytes or red blood cells are the infinite blood cells that are about 5-6 million per cubic millimetre of blood.
2. Such a huge number is essential as they carry the respiratory gases like oxygen and carbon-dioxide in the body.
3. It is accomplished by an iron-containing protein called haemoglobin which in turn is also responsible for providing the red pigmentation to the RBCs.

Final answer : Erythrocytes are red in colour because of the presence of a protein called haemoglobin.