8. Which of the following has been linked to Kaposi's sarcoma?
A.Epstein-Barr virus
B.Human T-cell lymphotropic virus
C.Human papilloma virus
D.Human herpes virus 8
9. Virulent and nonvirulent viruses may not
A.inhibit host cell DNA synthesis
B.inhibit host cell RNA synthesis
C.stimulate host cell macromolecule synthesis
D.degrade host cell DNA
10. The hepadnaviruses such as hepatitis B virus are quite different from other DNA viruses with respect to genome replication. These replicate their DNA using
A.DNA-dependent DNA polymerase
B.reverse transcriptase
C.Rnase H
D.DNA ligase
11. Which of the following virus is always detectable after infections?
A.Hepatitis B virus
B.Herpes simplex virus
C.Varicella-zoster virus
D.Cytomegalovirus
12. Viroids are composed of
A.single-stranded DNA
B.double-stranded DNA
C.single-stranded RNA
D.double-stranded RNA
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