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MCQs

Total Questions : 463 | Page 37 of 47 pages
Question 361. The bacterial viruses having head made up of large capsomeres, but no tail is morphologically classified as
  1.    A
  2.    B
  3.    C
  4.    D
 Discuss Question
Answer: Option D. -> D
Question 362. Group E phages have
  1.    single stranded DNA
  2.    double stranded DNA
  3.    double stranded DNA
  4.    single stranded RNA
 Discuss Question
Answer: Option D. -> single stranded RNA
Question 363. The temperate phage possesses a gene that codes for a repressor protein which makes the cell resistant to lysis initiated by
  1.    none of these
  2.    the prophage
  3.    lytic infection by other viruses
  4.    Both (a) and (b)
 Discuss Question
Answer: Option D. -> Both (a) and (b)
Question 364. Lesions on chorioallantoic membrane are produced by
  1.    all of these
  2.    Herpes B virus
  3.    Vaccinia virus
  4.    Herpes simplex virus
 Discuss Question
Answer: Option A. -> all of these
Question 365. Which of the following is not true of virions?
  1.    Are extracellular
  2.    Contain RNA
  3.    Reproduce independently
  4.    Contain DNA
 Discuss Question
Answer: Option C. -> Reproduce independently
Question 366. Which one is not useful in the treatment of viruses except
  1.    interferon
  2.    antibodies
  3.    acyclovir
  4.    penicillin
 Discuss Question
Answer: Option D. -> penicillin
Question 367. Bacteriophages have been used widely in genetic research, since they are the smallest and simplest biological entities capable of
  1.    self-duplication
  2.    duplication
  3.    self-replication
  4.    multiplication
 Discuss Question
Answer: Option C. -> self-replication
Question 368. The most complex type of bacterial viruses having hexagonal head, a rigid tail with a contractile sheath and tall fibers is morphologically classified as
  1.    B
  2.    C
  3.    D
  4.    A
 Discuss Question
Answer: Option D. -> A
Question 369. Which of the following viruses belong to family Hepadnaviridae?
  1.    Hepatitis A virus
  2.    All of these
  3.    Hepatitis D virus
  4.    Hepatitis B virus
 Discuss Question
Answer: Option D. -> Hepatitis B virus
Question 370. The most popular indirect method of counting virus particles is by
  1.    plaque-assay
  2.    counting plaque-forming units
  3.    hemagglutination assay
  4.    colony counting
 Discuss Question
Answer: Option C. -> hemagglutination assay

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