Question

What is antibody and what is the difference between antibody and antigen?

Answer 1

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Ans:-
Antigens are foreign particles, usually proteins, which are capable of generating an immune response in the body, a property known as immunogenicity. This immune response consists of specific antibodies which are generated byplasma cells as a result of exposure to a specific epitope presented by the antigen.

Answer 2

A blood protein produced in response to and counteracting a specific antigen. Antibodies combine chemically with substances which the body recognizes as alien, such as bacteria, viruses, and foreign substances in the blood is known as antibody.
Differences are:
 the difference between Antibody and Antigen?

• Both antigen and antibody are paramount for immunology. Both partake in autoimmune diseases and the end result is the same.

• Both antigens and antibodies are microscopic particles, and contain proteins. Antigens has combinations from polysaccharides as well, whereas antibodies are purely made up of proteins.

• Antigens can be cells, but antibodies are never cells.

• Antigens act as the key, whereas the antibodies act as the lock.

• There are mainly two types of antigens, which are self and non self.

• Antibodies are made of five main subcategories according to the proteins constructs. Depending on the permissive nature, it projects aspects of the antibody like placental transference, secretion, etc.

Thus, consider the antigen or the causative particle, as a key to lock on the antibody or the disease fighter. The key can take several forms, but the epitope has to be the same as the paratrope.