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Multiple Choice
Epitopes are:
A
A portion of an antibody molecule.
B
A portion of antigen recognized by antibody.
C
T cell receptors.
D
A molecule that binds to antigens.
Verified step by step guidance
1
Understand the definition of an epitope: An epitope is a specific part of an antigen that is recognized and bound by an antibody or a T cell receptor.
Differentiate between the terms: Antibody, antigen, and epitope. An antibody is a protein produced by the immune system to identify and neutralize foreign objects like bacteria and viruses. An antigen is any substance that causes the immune system to produce antibodies against it. An epitope is the specific part of the antigen that is recognized by the antibody.
Analyze the options given in the problem: Determine which option correctly describes an epitope. The options are: a portion of an antibody molecule, a portion of antigen recognized by antibody, T cell receptors, and a molecule that binds to antigens.
Evaluate each option: Consider the definition of an epitope and match it with the options provided. An epitope is not a portion of an antibody molecule, nor is it a T cell receptor. It is not a molecule that binds to antigens; rather, it is the part of the antigen that is recognized by the antibody.
Select the correct answer: Based on the analysis, the correct description of an epitope is 'a portion of antigen recognized by antibody.'