Which are the Main Open Reading Frames (ORFs) Present in All

Question

Which are the main open reading frames (ORFs) present in all retroviruses, including HIV?
A) vif, vpi, vpu
B) env, pol, gag
C) tat, nef, rev
D) vif, pol, tat
E) tat, nef, vpu

Accepted Answer

The three main ORFs present in all retroviruses, including HIV, are env, pol, and gag. Vif, vpi, vpu, tat, and nef are specific to certain retroviruses or HIV strains.