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MCQs

Total Questions : 195 | Page 6 of 20 pages
Question 51. The F factor DNA is sufficient to specify how many genes?
  1.    2
  2.    10
  3.    40
  4.    100
 Discuss Question
Answer: Option C. -> 40
Answer: (c).40
Question 52. How much time is required to inject a copy of the whole Hfr E.coli genome?
  1.    24 hrs
  2.    30 mins
  3.    100 mins
  4.    48 hrs
 Discuss Question
Answer: Option C. -> 100 mins
Answer: (c).100 mins
Question 53. Which of the following can be used as a measure to construct a linkage map of the Hfr chromosome?
  1.    frequency of recombination
  2.    time of entry
  3.    locus of mutation
  4.    transfer of F factor
 Discuss Question
Answer: Option B. -> time of entry
Answer: (b).time of entry
Question 54. The Hfr chromosome is transferred to the F— cell in a _____________ fashion.
  1.    circular
  2.    coiled
  3.    dimer
  4.    linear
 Discuss Question
Answer: Option D. -> linear
Answer: (d).linear
Question 55. Which of the following is true for an Hfr X F— cross?
  1.    frequency of recombination high,transfer of F factor low
  2.    frequency of recombination high,transfer of F factor high
  3.    frequency of recombination low,transfer of F factor high
  4.    frequency of recombination low,transfer of F factor low
 Discuss Question
Answer: Option A. -> frequency of recombination high,transfer of F factor low
Answer: (a).frequency of recombination high,transfer of F factor low
Question 56. How much time is taken by the new DNA to make whole phage particles?
  1.    24 hours
  2.    60 mins
  3.    2 mins
  4.    10-20 mins
 Discuss Question
Answer: Option D. -> 10-20 mins
Answer: (d).10-20 mins
Question 57. Bacteriophages inject their nucleic acid into the bacterium.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 58. Which of the following role is performed by a bacteriophage in transduction?
  1.    vector
  2.    donor
  3.    recipient
  4.    episome
 Discuss Question
Answer: Option A. -> vector
Answer: (a).vector
Question 59. When viral genome can become integrated into the bacterial genome they are known as ____________
  1.    temperate phage
  2.    prophage
  3.    bacteriophage
  4.    episome
 Discuss Question
Answer: Option B. -> prophage
Answer: (b).prophage
Question 60. The viral DNA may be incorporated into the phage head during phage assembly.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False

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