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MCQs

Total Questions : 463 | Page 40 of 47 pages
Question 391.  Which of the following disinfectant is effective against viruses?
  1.    Hydrogen peroxide
  2.    Hypochlorite
  3.    Formaldehyde
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 392.  When a virus enters a cell but does not replicate immediately, the situation is called
  1.    lysogeny
  2.    fermentation
  3.    symbiosis
  4.    synergism
 Discuss Question
Answer: Option A. -> lysogeny
Question 393.  Viruses require __________ for growth.
  1.    bacteria
  2.    plants
  3.    animals
  4.    living cells
 Discuss Question
Answer: Option D. -> living cells
Question 394.  Reverse transcriptase is a useful enzyme to have when
  1.    an RNA virus converts its RNA to DNA
  2.    there are no host cells present
  3.    nutrients are scarce
  4.    spikes are forming in the new virus
 Discuss Question
Answer: Option A. -> an RNA virus converts its RNA to DNA
Question 395.  Viruses largely lack metabolic machinery of their own to generate energy or to synthesize
  1.    protein
  2.    carbohydrate
  3.    alcohol
  4.    all of these
 Discuss Question
Answer: Option A. -> protein
Question 396.  The sequence of nucleic acid in a variety of viruses and viral host, will find more similarities
  1.    among different viruses than between viruses and their hosts
  2.    among different viral hosts than among different viruses
  3.    among different viral hosts than between viruses and their hosts
  4.    between viruses and their hosts than among different viruses
 Discuss Question
Answer: Option D. -> between viruses and their hosts than among different viruses
Question 397.  Usually viruses are separated into several large groups based primarily on
  1.    nature of the host
  2.    nucleic acid characteristics
  3.    capsid symmetry
  4.    diameter of the viroin or nucleocapsid
 Discuss Question
Answer: Option A. -> nature of the host
Question 398.  The first step in infection of a host bacterial cells by a phage is
  1.    adsorption
  2.    absorption
  3.    penetration
  4.    replication
 Discuss Question
Answer: Option A. -> adsorption
Question 399. . Edward Jenner began inoculating humans with material from __________ lesions.
  1.    Smallpox
  2.    Avianpox
  3.    Cowpox
  4.    Chickenpox
 Discuss Question
Answer: Option C. -> Cowpox
Question 400. . The viral nucleocapsid is the combination of
  1.    genome and capsid
  2.    capsid and spikes
  3.    envelope and capsid
  4.    capsomere and genome
 Discuss Question
Answer: Option A. -> genome and capsid

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