NEET 2010 Biology question

Which one of following statements is correct with respect to AIDS

(1)Drug addicts are least susceptible to HIV infection
(2)AIDS patients are being fully cured cent per cent with proper care and nutrition
(3)The causative HIV retrovirus enters helper T-lymphocyte thus reducing their numbersCorrect
(4)The HIV can be transmitted through eating food together with an infected person.

Answer: (3)

Solution

HIV is a retrovirus. After entering the body it infects macrophages and then helper T-lymphocytes (TH cells), where it uses reverse transcriptase to make viral DNA, which is incorporated into the host DNA; the virus replicates and progressively destroys helper T cells, so their number decreases and the immune system

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Question ID VK-090651