Question

Haemoglobin is present in
A) RBC
B) WBC
C) Platelets
D) Both A and B

Answer 1

Hint:Haemoglobin is the red colour pigment present in the blood of all vertebrates. It is a metallo-protein pigment responsible for the transport of oxygen.

Complete Answer:
To answer this question we should know about the structure and function of haemoglobin.
The word haemoglobin consists of two words haem meaning blood and globulin meaning sphere. It is an iron containing protein which is present in the blood of all vertebrates.
The human blood is mainly made up of three types of cells- WBC, RBC, platelets.
WBC or white blood cells can be granulated or agranulated. The major function of WBC is defence or protects our body from foreign invasions.
RBC- Also known as erythrocytes. These are anucleated cells which contain haemoglobin. Haemoglobin is responsible for transport of oxygen.
Platelets – These cells function to form blood clots.
Function of haemoglobin-
These molecules have high affinity for oxygen molecules. One molecule of haemoglobin carries four molecules of oxygen.
It also aids in transport of other gases like carbon dioxide. Haemoglobin binds with carbon dioxide and forms carbaminohemoglobin.
The haemoglobin also acts as an antioxidant.

Additional Information-Every 100 ml of blood carries 12-14 gm of haemoglobin. Deficiency of haemoglobin in blood can cause anaemia.

The correct answer is (A). Haemoglobin is present in RBC.

Note: Leghemoglobin is similar to haemoglobin in structure and is present in the root nodules of leguminous plants. They function in scavenging oxygen. The amount of haemoglobin varies from person to person. The level of haemoglobin in the blood can be increased by taking an iron rich diet.