Study the diagram showing replication of HIV in humans and answer the following questions accordingly :
(i) Write the chemical nature of the coat A . (ii) Name the enzyme B acting on X to produce molecule 0 . N ame 0 . (iii) Mention the riame of the host cell D the HIV attacks first when it enters into the human body. (iv) Name the two different cells the new viruses E suibsequently attack.

Explanation

(i) Coat A is made up of protein. (ii) The enzymeV B is reverse transcriptase, C is viral DNA. (iii) The host cell D is macrophage. (iv) The new viruses E subsequently attack macrophages and helper T-lymphocytes