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MCQs

Total Questions : 62 | Page 5 of 7 pages
Question 41. Agrobacterium tumefaciens is
  1.    a fungi that is used to produce antibiotics in large amounts
  2.    a disease in humans that causes loss of sight
  3.    a bacterium that can be used to introduce DNA into plants
  4.    a disease in humans that causes loss of weight
 Discuss Question
Answer: Option C. -> a bacterium that can be used to introduce DNA into plants
Question 42. In genetic engineering, a chimera is
  1.    a fungi
  2.    an enzyme that links DNA molecules
  3.    a virus that infects bacteria
  4.    a plasmid that contains foreign DNA
 Discuss Question
Answer: Option D. -> a plasmid that contains foreign DNA
Question 43. The Southern blotting technique depends on
  1.    similarities between the sequences of probe RNA and experimental RNA
  2.    the molecular mass of proteins
  3.    similarities between the sequences of probe DNA and experimental DNA
  4.    similarities between the sequences of probe protein and experimental protein
 Discuss Question
Answer: Option C. -> similarities between the sequences of probe DNA and experimental DNA
Question 44. Problems in obtaining large amounts of proteins encoded by recombinant genes can often be overcome by using
  1.    expression vectors
  2.    all of these
  3.    BACS
  4.    YACS
 Discuss Question
Answer: Option A. -> expression vectors
Question 45. The deliberate modifications of an organism's genetic information by directly changing its nucleic acid content is a subject matter of
  1.    microbiology
  2.    genetic engineering
  3.    population genetics
  4.    protein engineering
 Discuss Question
Answer: Option B. -> genetic engineering
Question 46. What is the normal role of restriction endonucleases in bacterial cells?
  1.    All of these
  2.    To degrade the bacterial chromosome into small pieces during replication
  3.    To degrade invading phage DNA
  4.    To produce RNA primers for replication
 Discuss Question
Answer: Option C. -> To degrade invading phage DNA
Question 47. Which of the following is obtained using processed mRNA molecules as a template?
  1.    rDNA
  2.    mDNA
  3.    cDNA
  4.    tDNA
 Discuss Question
Answer: Option C. -> cDNA
Question 48. Electroporation is
  1.    the process of combining foreign DNA to an electrically charged vector molecule
  2.    the application of high voltage pulses
  3.    the process of separating charged molecules through a gel maintained in an electric field
  4.    the process of multiplication of the cells
 Discuss Question
Answer: Option B. -> the application of high voltage pulses
Question 49. Vectors are
  1.    molecules that are able to covalently bond to and carry foreign DNA into cells
  2.    molecules that degrade nucleic acids
  3.    molecules that help in replication
  4.    molecules that protect host cells from invasion by foreign DNA
 Discuss Question
Answer: Option A. -> molecules that are able to covalently bond to and carry foreign DNA into cells
Question 50. Which of the following is not commonly used as vector?
  1.    Artificial chromosome
  2.    Fungi
  3.    Plasmid
  4.    Cosmid
 Discuss Question
Answer: Option B. -> Fungi

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