1-What is the relationship between an antibody and an antigen? A

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1-What is the relationship between an antibody and an antigen?

A. Antigens are recognized by antibodies , and they can bind to each other. 

B.Antibodies make us sick; antigens cure us.

C. Antibodies are made from antigens. 

D.Antibodies are produced by pathogens , in response to our body's antigens. 

E.Antigens are stored inside antibodies .

 

2- Which cell type is correctly matched with its function? A.memory cell phagocytose pathogens 

B.cytotoxic T cell infected host cells 

C.plasma cell- activates innate immune responses 

D. helper T cell produces antibodies

 

3- For the successful development of a vaccine to be used against a pathogen, it is necessary that 

A. the surface antigens of the pathogen do not change 

B. all of the surface antigens on the pathogen be identified 

C. the pathogen has only one epitope. 

D. the MHC molecules are heterozygous. 

E. rearrangement of the B cell receptor antibodies takes place.

 

4- If an infant had hisher thymus destroyed or rendered non-functional, what would be a likely consequence?

A. mature cells would not be produced 

B. reduced number of B cells and no antibodies. 

C. Lack humoral immunity 

D. MHC molecules would be missing from surfaces. 

E. lack of innate immunity

 

5- A plasma cell is a cell that has differentiated from a: 

A. T cell 

B. Dendritic cell. 

C. NK cell 

D. B cell 

E. mast cell

 

6- An example of ———immunity would be an infant getting antibodies from breast feeding.

A. humoral

B. cell-mediated 

C. passive

D. nonspecific 

E. active

 

7. How does the complement contribute to the immune response ? 

A. enhancing the effects of antibiotics 

B. coating the surface of microbes, thus making it easier for macrophages to phagocytize them 

C. reducing inflammation 

D. all of the above x

E. Non of the above