IMMUNOLOGY

MISCELLENOUS

VACCINATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is antigen?
A
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B
single antigen usually has single epitopes
C
lymphocytes binds to antigen epitope
D
foreign molecules that is recognized by and elicits a response from lymphocytes
Explanation: 

Detailed explanation-1: -Lymphocytes recognize a specific foreign substance. The term antigen is used for a substance which can elicit an adaptive immune response. Most antigens are large, complex molecules that are not present in the body. So, the correct option is ‘Antigens’.

Detailed explanation-2: -B-lymphocytes recognize pathogens and other foreign proteins, they also evolve cells that can make antibodies to the pathogen or the foreign antigen. Antibodies are highly specific to their target antigen. By attaching to their specific targets, antibodies mark these antigens for destruction by other cells.

Detailed explanation-3: -As each lymphocyte develops in a central lymphoid organ, it becomes committed to react with a particular antigen before ever being exposed to the antigen. It expresses this commitment in the form of cell-surface receptor proteins that specifically fit the antigen.

There is 1 question to complete.