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MCQs

Total Questions : 107 | Page 4 of 11 pages
Question 31. Antisense technology
  1.    alters or transfers cells
  2.    selectively blocks expression of a gene
  3.    combines genetic material from different species
  4.    combines organelles and cells
 Discuss Question
Answer: Option B. -> selectively blocks expression of a gene
Question 32. Insect resistance in the transgenic plant has been achieved by
  1.    transferring genes for Bt toxins
  2.    transferring genes for other insecticidal secondary metabolities
  3.    All of these
  4.    transferring genes for protease inhibitors
 Discuss Question
Answer: Option C. -> All of these
Question 33. The delayed ripening tomato was created by a biotechnologist who __________ a gene.
  1.    relocated
  2.    silenced
  3.    altered
  4.    replaced
 Discuss Question
Answer: Option B. -> silenced
Question 34. The first field tests were conducted with which of the following genetically altered organism?
  1.    Vaccinia virus containing a gene from the rabies virus
  2.    bt Corn
  3.    Strawberry seedlings sprayed with ice-minus bacteria
  4.    The flavrsavr tomato
 Discuss Question
Answer: Option C. -> Strawberry seedlings sprayed with ice-minus bacteria
Question 35. Antisense transgenic plants produced fruit that softened
  1.    more slowly than the normal fruit
  2.    none of these
  3.    more rapidly than the normal fruit
  4.    as the normal fruits
 Discuss Question
Answer: Option A. -> more slowly than the normal fruit
Question 36. A __________ is a small laboratory set up to simulate conditions of a particular environment.
  1.    microcosm
  2.    bioremediation
  3.    rhizosecretion
  4.    mibridization
 Discuss Question
Answer: Option A. -> microcosm
Question 37. The roots of a plant are converted into drug-producing structures in a process called
  1.    rhizosecretion
  2.    microcosm establishment
  3.    mibridization
  4.    bioremediation
 Discuss Question
Answer: Option A. -> rhizosecretion
Question 38. Resistance to L-phosphinothrium in tobacco plants is developed by the transfer of
  1.    gene for EPSPS (5-enol-pyruvyl shikimat 3 phosphate synthase)
  2.    gene for ALS (acetolactate synthase)
  3.    gene for GS (glutamine synthase)
  4.    any of the above
 Discuss Question
Answer: Option C. -> gene for GS (glutamine synthase)
Question 39. Two genes from a bacterium (Alcaligenes eutrophus) and a cotton gene produce
  1.    herbicide resistance
  2.    a vaccine against the bacterium
  3.    a pharmaceutical product
  4.    a plastic
 Discuss Question
Answer: Option D. -> a plastic
Question 40. ACC demainase gene is responsible for
  1.    synthesis for ethylene
  2.    both (a) and (b)
  3.    synthesis of polygalactouranase
  4.    degradation of ACC an immediate precursor to ethylene
 Discuss Question
Answer: Option D. -> degradation of ACC an immediate precursor to ethylene

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