Question

Most abundant immunoglobulin is

• A. IgA
• B. IgE
• C. IgG
• D. IgM

Answer 1

The correct option is C

IgG

The correct option is option C.

Explanation for the correct option:

1. Immunoglobulins are also known as antibodies.
2. In chemical nature, these are glycoproteins.
3. Immunoglobulins are part of our immune system.
4. These are produced by B-lymphocyte cells when any foreign organism or substance enters our body.
5. There are 5 types of antibodies found: IgG, IgA, IgE, IgM, and IgD.
6. The most abundant antibody is IgG.
7. It is 75% of total antibodies.
8. When any antigen first time enters our body the amount of produced IgG is very lesser but if the same antigen enters again it is produced in a huge amount.
9. This is the main antibody that attacks the microbes and their toxins.

Explanation for the incorrect options:

Option A: IgA is the 15% of the total antibodies. This is secreted with saliva and milk and mucous.

Option B: IgE is found in blood serum in very lesser amounts.

Option D: IgM is 10% of total antibodies. It is the largest antibody and it is a pentamer.

Final answer: Most abundant immunoglobulin is IgG.