NEET 2011 Biology question

At which stage of HIV infection does one usually show symptoms of AIDS ?

(1)When the infecting retrovirus enters host cells
(2)When viral DNA is produced by reverse transcriptase
(3)When HIV replicates rapidly in helper T-lymphocytes and damages large number of theseCorrect
(4)Within 15 days of sexual contact with an infected person.

Answer: (3)

Solution

After HIV enters macrophages, its RNA is converted to viral DNA by reverse transcriptase and integrated into the host DNA; there is a long asymptomatic period. The virus then replicates rapidly in the helper T-lymphocytes (TH cells), and as the

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Question ID VK-090848