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MCQs

Total Questions : 463 | Page 41 of 47 pages
Question 401.  Which of the following viruses has not been associated with human cancer?
  1.    Hepatitis C virus
  2.    Hepatitis B virus
  3.    Varicella-Zoster virus
  4.    Herpes simplex virus type 2
 Discuss Question
Answer: Option C. -> Varicella-Zoster virus
Question 402. . The envelope of which of the following viruses is derived from the host cell nucleus?
  1.    Paramyxoviruses
  2.    Retroviruses
  3.    Orthomyxoviruses
  4.    Herpesviruses
 Discuss Question
Answer: Option D. -> Herpesviruses
Question 403. . Enveloped viruses have a __________ shape.
  1.    icosahedral
  2.    helical
  3.    roughly spherical
  4.    complex
 Discuss Question
Answer: Option C. -> roughly spherical
Question 404. . The viruses in an attenuated vaccine
  1.    have no genome
  2.    continue to replicate
  3.    are usually larger than bacteria
  4.    is altered with chemicals
 Discuss Question
Answer: Option B. -> continue to replicate
Question 405. . Which of the following is semi-continuous (diploid) cell line?
  1.    HeLa
  2.    HEp-2
  3.    WI-38
  4.    KB
 Discuss Question
Answer: Option C. -> WI-38
Question 406. . In cell culture, measles virus may lead to
  1.    nuclear pyknosis
  2.    transformation of cells
  3.    syncytium formation
  4.    rounding and aggregation of cells
 Discuss Question
Answer: Option C. -> syncytium formation
Question 407. . Plant viruses may be cultivated in
  1.    tissue culture
  2.    cultures of separated cells
  3.    whole plants
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Question 408. . A change from lysogeny to lysis is generally induced by
  1.    ultraviolet light
  2.    chemicals
  3.    irradiation
  4.    all of these
 Discuss Question
Answer: Option A. -> ultraviolet light
Question 409. . The oncogene theory refers to
  1.    how chemicals inactivate viruses when applied
  2.    how viruses replicate in host cells
  3.    how viruses replicate in host cells
  4.    none of these
 Discuss Question
Answer: Option C. -> how viruses replicate in host cells
Question 410. . The viral DNA is removed from the host's chromosomes and the lytic cycle occurs. The process is called
  1.    spontaneous induction
  2.    inductive infection
  3.    resultant induction
  4.    spontaneous infection
 Discuss Question
Answer: Option A. -> spontaneous induction

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