Q. At which stage of HIV infection does one usually show symptoms of AIDS?
A) Within 15 days of sexual contact with an infected person
B) When the infecting retrovirus enters host cells
C) When viral DNA is produced by reverse transcriptase
D) When HIV replicates rapidly in helper T-lymphocytes and damages large number of these
Explanation
[Solution from source] After infection, HIV multiplies in macrophages and later in helper T-lymphocytes; AIDS symptoms appear when the virus replicates rapidly and destroys large numbers of these cells, crippling immunity. This usually takes years, not days after contact. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.