NEET2014ZoologyHuman Health and DiseasesActual
At which stage of HIV infection does one usually show symptoms of AIDS?
Options
- AWithin 15 days of sexual contact with an infected person.
- BWhen the infected retro virus enters host cells.
- CWhen HIV damages large number of helper T-Lymphocytes.
- DWhen the viral DNA is produced by reverse transcriptase.
Correct answer
C. When HIV damages large number of helper T-Lymphocytes.
Step-by-step solution
HIV selectively destroys helper T-lymphocytes. It, therefore, causes symptoms of immunodeficiency due to a critically low number of helper T-lymphocytes. The T H cells are attacked by HIV and stop the triggering of B-lymphocytes by the T-cells, and thereby the immunodeficiency will be observed in the absence of antibodies.