Part 5 HIV Multiple choice questions

21q: env gene encodes which of the following constituents of the HIV-1 virus ?


a. encodes the enzymes responsible for protease processing of viral proteins
b. encodes the envelope glycoproteins
c. encodes the proteins that forms the core of the virion
d. p24 antigen
e. both c and d

answer b . env gene encodes the envelope glycoproteins

22q: HIV-1 genome contains all the following genes except ?


a. vpu
b. vpr
c. vpx
d. tat
e. rev
f. nef
g. vif

answer c . vpx gene is present only in HIV-2 and not in HIV-1

23q: HIV-2 genome contains all the following genes except ?


a. vpu
b. vpr
c. vpx
d. tat
e. rev
f. nef
g. vif

answer a . vpu gene is absent in HIV-2 and instead of it vpx gene is present .

24q: which of the following is not a group of HIV-1 viruses ?


a. L group
b. M group
c. N group
d. O group

answer d . L group , there is no such group M stands for Major and O stands for Outlier

25q: what are the nine subtypes or clades comprising the M group of HIV-1 viruses ?


a. A, B, C, D, E, F, G, H, I
b. A, B, C, D, F, G, H, J, K
c. A, B, C, D, G, H , J, K, L
d. A, B, C, D, E, H, J, K, L

answer b . A, B, C, D, F, G, H, J, K subtypes of M group