Question

Immunoglobulins that are most abundant and are responsible for resistance against many viruses, bacteria, and bacterial toxins are

A) IgG.
B) IgE.
C) IgD.
D) IgM.
E) IgA.

Answer 1

The correct answer is A) IgG

Step-by-step explanation:

IgG immunoglobulins are the most abundant antibodies constituting about 70-75% of total immunoglobulins present in the human serum. They have a half life of 7-21 days. These antibodies is produced and released by plasma B cells.

Function: IgG antibody is responsible for resistance against many viruses, bacteria, and bacterial toxin therefore they protect our body from these infections.

IgG antibody binds to the pathogen and carry them to phagocytic cells which eliminate them by phagocytosis. They also activate complement system which is very efficient in killing of various types of pathogens.

Thus, the correct answer is A) IgG.