At which stage of HIV infection does one usually show symptoms of AIDS?
Correct answer: C. When HIV damages a large number of helper T-lymphocytes
- A. Within 15 days of sexual contact with an infected person
- B. When the infected retrovirus enters host cells
- C. When HIV damages a large number of helper T-lymphocytes
- D. When the viral DNA is produced by reverse transcriptase
Explanation
AIDS is a condition that arises when the immune system is severely compromised due to a significant reduction in CD4 cells, which are targeted by the HIV virus. HIV initially infects the host by entering cells and using its reverse transcriptase to integrate its genetic material into the host's DNA. Over time, as the number of helper T-lymphocytes (CD4 cells) is depleted, the immune system weakens, leading to the symptoms associated with AIDS. This progressive damage does not occur immediately after infection or at the initial entry of the virus into cells, but rather after a significant loss of CD4 cells.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Biodiversity and Variety of Life
Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.
Practise Biodiversity and Variety of Life
3,130 free Biodiversity and Variety of Life MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.