what is the difference of antigens and antibodies and what are the specifice functions of these two???

Answer 1

An antibody is a protein produced by a host to bind
to, and thus inactivate, foreign particles. The
particle is called the antigen. It is frequently but
not always a protein. The binding of antibody to
antigen is very specific, so that, if all goes well,
the antibody binds to that specific antigen only.
The part of the antigen molecule to which the antibody
binds is called the epitope.

Answer 2

Antigens are complex, foreign molecules that provoke an immune response. More often than not they are proteins, but they can also be carbohydrates, nucleic acids, or lipids (rarely). Cells, such as bacterium and your body cells have antigens on their surface. They are there, in our case, for recognition purposes - meaning our body recognizes them as self and doesn't destroy that cell. But antigens do not have to be on the surface of a cell. Proteins in plasma can be antigens and elicit an immune response in a person who gets a plasma transfusion. The functions of antigens vary depending on what the antigen is. Red Blood Cell antigens don't have any specific function that we know of, while some antigens have a particular purpose (like plasma proteins that are transfused into another person).

Antibodies are proteins that are produced by plasma cells (or specialized B lymphocytes). They are "Y" shaped and react with, or bind to, antigens and result in the destruction of that antigen. Most antibodies are specific meaning one antibody, one antigen, but some are not.

Answer 3

Antigens are mainly foreign particles which may cause allergic reactions or diseases. Anything the body considers as foreign is an antigen like dust, pathogens etc.

Antibodies are specific proteins produced by the body to fight against antigens. For every antigen our body produces a specific antiboby against it.

Antibodies are protein molecules having specific structure. An antiboby has the shape of the alphabet 'Y'.

There are 5 types of antibobies
IgG, IgA, IgM, IgD, IgE .

Answer 4

Antigens are small markers (protein or carbohydrate) on the surface of cells that identify those cells. Your red blood cells have either A antigens, B antigens, both or neither. Meaning you are type A, B, AB or O respectivly.
Antibodies are small bits of protein created by your immune system that collect and stick to each other and one specific antigen, (they "agglutinate") your body produces antibodies that stick to a bacterium or virus that you have encountered before. The antibodies agglutinate on the virus or bacterium and another white blood cell called a phagocyte comes by and "eats" the virus or bacterium and digests it.

Answer 5

antigens are proteins on a cell's surface. antibodies are proteins produced by lymphocytes which can attach to antigens, depending on whether specific receptor sites are present