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MCQs

Total Questions : 82 | Page 6 of 9 pages
Question 51.  A microarray differs from a gene fusion in that, it
  1.    carries DNA segments from many different genes
  2.    is not constructed by cloning
  3.    gives direct measurement of mRNA level
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Question 52. . Which of the following is the cause for drug resistance in tuberculosis?
  1.    Mutation
  2.    Transduction
  3.    Transformation
  4.    Conjugation
 Discuss Question
Answer: Option A. -> Mutation
Question 53. . Who discovered transposons (jumping genes)?
  1.    Abelson
  2.    Harvey
  3.    McClintock
  4.    Griffith
 Discuss Question
Answer: Option C. -> McClintock
Question 54. . The term used for plasmids possessing both RTF and r determinants is
  1.    A. non self-transmissible plasmids
  2.    non conjugative plasmids
  3.    conjugative plasmids
  4.    none of the above
 Discuss Question
Answer: Option B. -> non conjugative plasmids
Question 55. . What information can be generated by interrupted mating experiments?
  1.    Levels of DNA homology
  2.    Bacterial genome maps
  3.    DNA nucleotide sequences
  4.    Proteomics of the bacteria
 Discuss Question
Answer: Option B. -> Bacterial genome maps
Question 56. . 
Which of the following type of recombination does not require homologous sequences and is important for the integration of viral genomes into bacterial chromosomes?
  1.    Mutagenic recombimation
  2.    Site-specific recombination
  3.    Replicative recombination
  4.    General recombination
 Discuss Question
Answer: Option B. -> Site-specific recombination
Question 57. . Diagnostic DNA probes have been developed for
  1.    Mycobacterium tuberculosis
  2.    Hepatitis B virus
  3.    Human immunodeficiency virus
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Question 58. . Which of the following statement(s) is/are true in regards to F+ x F- mating events?
  1.    DNA is transferred from F- to F+ cells
  2.    DNA is transferred from F+ to F- cells
  3.    No DNA is transferred because F- cells are unable to perform conjugation
  4.    No DNA is transferred because F+ cells are unable to perform conjugation
 Discuss Question
Answer: Option B. -> DNA is transferred from F+ to F- cells
Question 59. . When composite transposons are formed
  1.    a small deletion occurs in the transposase gene of an IS element
  2.    a small deletion occurs in the transposase gene of an IS element and plasmid is integrated
  3.    an IS element integrates with another IS element with the help of a plasmid
  4.    two IS elements integrate into a chromosome with only a small distance separating them
 Discuss Question
Answer: Option D. -> two IS elements integrate into a chromosome with only a small distance separating them
Question 60. .  Which of the following transport bacterial DNA to other bacteria via bacteriophages?
  1.    Conjugation
  2.    Transduction
  3.    Transformation
  4.    Translation
 Discuss Question
Answer: Option B. -> Transduction

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