Viruses In Eukaryotes(Microbiology ) Questions and Answers

Question 1. Viral RNA is replicated in the host cell
  1.    lysozomes
  2.    nucleus
  3.    mitochondria
  4.    cytoplasmic matrix
Explanation:-
Answer: Option D. -> cytoplasmic matrix
Question 2. __________is probably the most important characteristic for classification of viruses in eukaryotes.
  1.    Chemical nature of virion constituents
  2.    Host preference
  3.    Morphology
  4.    Physical nature of virion constituents
Explanation:-
Answer: Option B. -> Host preference
Question 3. Which of the following is the agent associated with the development of neurodegenerative disease in livestock and humans?
  1.    Viroids
  2.    Prions
  3.    virions
  4.    Virinos
Explanation:-
Answer: Option B. -> Prions
Question 4. The __________ of the influenza-enveloped virus appear to be involved in attachment to the host cell receptor site.
  1.    flagellae
  2.    neuraminidase
  3.    hemagluttinin
  4.    fimbriae
Explanation:-
Answer: Option C. -> hemagluttinin
Question 5. Intracellular structures formed during many viral infections, called __________ , which can directly disrupt cell structure.
  1.    prokaryotes
  2.    cytocidal bodies
  3.    inclusion bodies
  4.    chromosomal disruptions
Explanation:-
Answer: Option C. -> inclusion bodies
Question 6. Which family has received most interest in their development as a biological control agent against insects?
  1.    Iridoviridae
  2.    Reoviridae
  3.    Poxviridae
  4.    Baculoviridae
Explanation:-
Answer: Option D. -> Baculoviridae
Question 7. In cancer, the reversion of cells to a more primitive or less differentiated state is called
  1.    oncogenic
  2.    anaplasia
  3.    metastasis
  4.    neoplasia
Explanation:-
Answer: Option B. -> anaplasia
Question 8. Virulent and nonvirulent viruses may not
  1.    inhibit host cell RNA synthesis
  2.    degrade host cell DNA
  3.    stimulate host cell macromolecule synthesis
  4.    inhibit host cell DNA synthesis
Explanation:-
Answer: Option B. -> degrade host cell DNA
Question 9. The hepadnaviruses such as hepatitis B virus are quite different from other DNA viruses with respect to genome replication. These replicate their DNA using
  1.    DNA-dependent DNA polymerase
  2.    reverse transcriptase
  3.    Rnase H
  4.    DNA ligase
Explanation:-
Answer: Option B. -> reverse transcriptase
Question 10. Which of the following has been linked to Kaposi's sarcoma?
  1.    Human herpes virus 8
  2.    Human papilloma virus
  3.    Human T-cell lymphotropic virus
  4.    Epstein-Barr virus
Explanation:-
Answer: Option A. -> Human herpes virus 8
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