E-PolyLearning

26. The transfer of intermediate vectors into Agrobacterium are brought about by
a. transformation
b. biparental mating
c. triparental mating
d. transduction
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Answer: (c).triparental mating

27. In response to the activating signal molecule, an endonuclease is produced that causes nicks in the T-DNA. It is encoded by
a. vir A
b. vir B
c. vir C
d. vir D
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Answer: (d).vir D

28. Microinjection involves
a. injection of large amount of DNA
b. injection of DNA into bigger cells
c. injection with needle having diameter greater than cell diameter
d. all of the above
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Answer: (c).injection with needle having diameter greater than cell diameter

29. Which of the following is true about Agrobacterium tumefaciens?
a. It causes crown gall disease of plants
b. It infects gymosperms
c. It infects dicotyledonous angiosperms
d. All of the above
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Answer: (d).All of the above

30. In the liposome mediated gene transfer in plants, nucleic acids are
a. protected from nuclease digestion
b. stable in liposomes
c. both (a) and (b)
d. not stable in liposomes
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Answer: (c).both (a) and (b)

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