Question

A person who has an allergy, the type of antibody responsible for, it is
A. IgA.
B. IgG.
C. IgE.
D. IgM.

Answer 1

Hint: Antibodies are specialized “Y” shaped proteins that bind like a lock and key to bacteria, viruses, fungi, or other parasites. They search and destroy foreign particles.

Step by step answer: The antibody responsible for any allergies is IgE. If our body contains any type of allergens, our immune system overreacts to the allergen by producing antibodies called Immunoglobulin E (IgE). These antibodies travel to cells that release chemicals, causing an allergic reaction. This reaction usually causes symptoms in the nose, lungs, throat, or in the skin. These antibodies are involved in allergic reactions to milk, medicines, toxins, etc. Each type of IgE is specific for each type of allergen. For example, some people are only allergic to cat dander, while others are allergic to multiple allergens because they have many types of IgE antibodies.
i. IgA: Immunoglobulin A is an antibody that has an important role in the immune system of mucous membranes. It is greater than any other type of antibodies associated with the mucosal membrane.
ii. IgG: It is present in the humoral immunity. It is majorly seen in the blood and extracellular fluid, which allows controlling infections of body tissues. This antibody binds to many pathogens like viruses, bacteria, and fungi.
iii. IgM: IgM is the largest antibody, and it is the first antibody to appear in the response to initial exposure to a pathogen. In the case of humans and other mammals, the spleen is the major site of specific IgM production.
Hence the correct answer is option C.

Note: Antibodies are proteins produced by mature B-cells. It is an integral part of adaptive immunity. It is a Y-shaped structure that consists of the constant and the variable region.