Why do some adolescent start taking drugs?How can this be avoided.

5

(a)

What is Pulse Polio Programme of  Government of India? What is OPV? Why is it that India is yet to eradicate Pollio.

5

(a)

What are recombinant DNA vaccines? Give two examples of such vaccines. Discuss their advantages.

5

(a)

In the given flow diagram, the replication of retrovirus in a host is shown. Observe and answer the following questions.
(a) fill in (A) and (B)

b) Why is the virus called retrovirus?
(c) Can the infected cell survive, while viruses are being replicated and released?

5

(a)

Represent schematically the life cycle of a malarial parasite.

5

(a)