NEET 2011 Biology question

Select the correct statement with respect to diseases and immunisation :

(1)If due to some reason B-and T-lymphocytes are damaged, the body will not produce antibodies against a pathogenCorrect
(2)Injection of dead / inactivated pathogens causes passive immunity
(3)Certain protozoans have been used to mass produce hepatitis B vaccine.
(4)Injection of snake antivenom against snake bite is an example of active immunisation

Answer: (1)

Solution

Antibody production is the work of B-lymphocytes (which secrete antibodies) with the help of helper T-cells; if both are damaged, the body cannot produce antibodies against a pathogen, so (1) is correct. (2) is wrong: dead or inactivated pathogens in a

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Question ID VK-090728