Human Health and Diseases Question 67
67. Select the correct statement with respect to diseases and immunisation?
[2011M]
(a) Ifdue to somereason B-and T-lymphocytes are damaged, the body will not produce antibodies against a pathogen
(b) Injection of dead / inactivated pathogens causes passive immunity
(c) Certain protozoans have been used to mass produce hepatitis $B$ vaccine.
(d) Injection of snake antivenom against snake bite is an example of active immunisation
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Answer : a
Hints & Solutions
(a) B and T-lymphocytes produce antibodies against pathogen in the body, if due to some reason $B$ and $T$ lymphocytes are damaged the body will not produce antibodies against a pathogen. Each B cell and T cell is specific for a particular antigen.
