Which of the following descriptions about T cell epitope is correct?
A. It locates on the surface of antigen molecules
B. It can activate T cells directly
C. It belongs to linear epitope or conformational epitope
D. It needs to be presented by MHC molecules
E. It belongs to complete antigens
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Which of the followings is both an antigen and an antibody to human being
A. Bacterial exotoxin
B. Horse anti-tetanus serum
C. Toxoid
D. HLA
E. Interferon
The different antigens existing in different individuals of the same species are called
A. Idiotypic antigens
B. Autoantigens
C. Xenoantigens
D. Alloantigens
E. Heterophilic antigens
Which of the followings is correct about hapten?
A. It has immunogenicity and immunoreactivity
B. It has immunogenicity and no immunoreactivity
C. It has immunoreactivity but no immunogenicity
D. Only after binding with the carrier can it bind to the corresponding antibody
E. It is a polyclonal activator
Which of the following is not the property of the antigen?
Antigens are macromolecular substances
B. All the antigens are foreign substances to the body
C. The antigen that has immunogenicity will certainly have immunoreactivity
D. The antigen that has immunoreactivity will certainly have immunogenicity
E. The epitopes specifically bind to TCR / BCR or antibody
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