Viruses in Eukaryotes

Q1: 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

ANS:D - Human herpes virus 8

No answer description is available.

Q2: __________is probably the most important characteristic for classification of viruses in eukaryotes.

A Host preference

B Morphology

C Physical nature of virion constituents

D Chemical nature of virion constituents

ANS:A - Host preference

No answer description is available.

Q3: The __________ of the influenza-enveloped virus appear to be involved in attachment to the host cell receptor site.

A fimbriae

B flagellae

C hemagluttinin

D neuraminidase

ANS:C - hemagluttinin

No answer description is available.

Q4: Viroids are composed of

A single-stranded DNA

B double-stranded DNA

C single-stranded RNA

D double-stranded RNA

ANS:C - single-stranded RNA

No answer description is available.

Q5: Which of the following is the agent associated with the development of neurodegenerative disease in livestock and humans?

A Prions

B Viroids

C virions

D Virinos

ANS:A - Prions

No answer description is available.

Q6: Viral RNA is replicated in the host cell

A cytoplasmic matrix

B nucleus

C mitochondria

D lysozomes

ANS:A - cytoplasmic matrix

No answer description is available.

Q7: Intracellular structures formed during many viral infections, called __________ , which can directly disrupt cell structure.

A prokaryotes

B chromosomal disruptions

C inclusion bodies

D cytocidal bodies

ANS:C - inclusion bodies

No answer description is available.

Q8: 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

ANS:D - degrade host cell DNA

No answer description is available.

Q9: Which of the following virus is always detectable after infections?

A Hepatitis B virus

B Herpes simplex virus

C Varicella-zoster virus

D Cytomegalovirus

ANS:A - Hepatitis B virus

Hepatitis B virus incubation time is very long, it's not detectable easily.

Q10: Which family has received most interest in their development as a biological control agent against insects?

A Reoviridae

B Baculoviridae

C Iridoviridae

D Poxviridae

ANS:B - Baculoviridae

No answer description is available.

Q11: In cancer, the reversion of cells to a more primitive or less differentiated state is called

A neoplasia

B anaplasia

C metastasis

D oncogenic

ANS:B - anaplasia

No answer description is available.

Q12: 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

ANS:B - reverse transcriptase

No answer description is available.

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