PRIMARY AND SECONDARY IMMUNE RESPONSE

                

Primary                                          secondary immune   response             immune                                                              response

Clonal selection refers to the binding by antigen of lymphocytes with a complementary receptor; this occurs in both primary and secondary immune responses.

1.Secondary immune response is generated due to (June 2006) 

a) naive B cells 
b) Memory cells 
c) naive T cells 
d) NK cells

Ans.b
2.Which among following is responsible for humoral immunity?---
A) B-lymphocytes
B) T-lymphocytes
C) L-lymphocytes
D) P-lymphocytes
Ans. A

3.Which class of immunoglobulins will increase in case
 of a chronic infection?
 1. IgA
 2. IgG
 3. IgM
 4. IgE
Ans.2

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