Sequencing of HIV-1 revealed that it is most closely related to which of the following?
A) simian immunodeficiency virus
B) feline immunodeficiency virus
C) bovine immunodeficiency virus
D) hepatitis B
E) all of these

Question

Quizplus · Accepted Answer

Sequencing of HIV-1 has revealed that it is most closely related to simian immunodeficiency virus (SIV), which infects non-human primates. This suggests that HIV-1 originally crossed over from chimpanzees to humans through the consumption or handling of infected bushmeat. While feline, bovine, and human immunodeficiency viruses share some similarities with HIV-1, SIV is the closest genetic relative. Hepatitis B is not related to HIV-1.

Sequencing of HIV-1 Revealed That It Is Most Closely Related