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MCQs

Total Questions : 82 | Page 7 of 9 pages
Question 61. . Which of the following plamids do not possess information for self transfer to another cell?
  1.    Cryptic plasmids
  2.    Conjugative plasmids
  3.    Non-conjugative plasmids
  4.    None of these
 Discuss Question
Answer: Option C. -> Non-conjugative plasmids
Question 62. .  Penicillin resistance in staphylococci is acquired due to
  1.    conjugation
  2.    mutation
  3.    transformation
  4.    transduction
 Discuss Question
Answer: Option D. -> transduction
Question 63. . The term used for acquisition of naked DNA from its environment and its incorporation in their genome by a bacterium is
  1.    transformation
  2.    lysogenic conversion
  3.    conjugation
  4.    transduction
 Discuss Question
Answer: Option A. -> transformation
Question 64. .  What is term used for a bacterial cell that is able to take up naked DNA?
  1.    Complementary
  2.    Liable
  3.    Competent
  4.    Infected
 Discuss Question
Answer: Option C. -> Competent
Question 65. . The plasmid which makes the host more pathogenic is
  1.    F factors
  2.    Metabolic plasmid
  3.    Virulence plasmid
  4.    None of these
 Discuss Question
Answer: Option C. -> Virulence plasmid
Question 66. . The expression of gene X (which has promoter Px) is to be monitored. A gene fusion construction for carrying this work will
  1.    have Px but not the rest of the X coding region
  2.    have the promoter of lacZ or some other reporter gene
  3.    allow to monitor the expression of all genes with a promoter similar in sequence to Px
  4.    give the same information as from a microarray
 Discuss Question
Answer: Option A. -> have Px but not the rest of the X coding region
Question 67. . The transducing particles carry only specific portions of the bacterial genome in which of the following transduction?
  1.    Specialized transduction
  2.    General transduction
  3.    Abortive transduction
  4.    None of these
 Discuss Question
Answer: Option A. -> Specialized transduction
Question 68. . The correct term for the transfer of genetic material between bacteria in direct physical contact is
  1.    conjugation
  2.    transformation
  3.    replication
  4.    transduction
 Discuss Question
Answer: Option A. -> conjugation
Question 69. . Which of the following is used by microbial genetisists as a tool?
  1.    Bacteriophage
  2.    Plasmids
  3.    Transposable elements
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 70. . Which of the following type of recombination does not require homologous sequences and is utilized by mobile genetic elements that move about chromosomes?
  1.    Mutagenic recombimation
  2.    Site-specific recombination
  3.    Replicative recombination
  4.    General recombination
 Discuss Question
Answer: Option C. -> Replicative recombination

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