11. Which of the following is true about Agrobacterium tumefaciens?
A. It causes crown gall disease of plants
B. It infects gymnosperms
C. It infects dicotyledonous angiosperms
D. All of the above
12. 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
13. Advantage of microprojectile method over the microinjection method for gene transfer in plants include
A. intact cells are used
B. method is universal in its application irrespective of all shape, size, type and presence or absence of cell wall
C. gene can be transferred to many cells simultaneously
D. all of the above
14. On Ti-plasmid T-region or T-DNA is flanked by a direct repeat of
A. 12 bp
B. 20 bp
C. 25 bp
D. 30 bp
15. Agrobacterium tumefaciens is a
A. gram (+) bacteria
B. gram (-) bacteria
C. a fungi
D. a yeast
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