A) exposing the plants to cold for a brief period.
B) allowing the plant roots to stand in water.
C) infection of the plant by Agrobacterium tumefaciens.
D) None of these
Correct Answer: C
Solution :
[c] \[{{T}_{i}}\] plasmid (tumor inducing) from the soil bacterium Agrobacterium tumefaciens is effectively used as vector for gene transfer to plant cells. The part of \[{{T}_{i}}\] plasmid transferred into plant cell DNA, is called the T-DNA. The T-DNA with desired DNA spliced into it, is inserted into the chromosomes of the host plant where it produces copies of itself, by migrating from one chromosomal position to another at random. Such plant cells are then cultured, induced to multiply and differentiate to form plantlet, transferred into soil, the plantlets grow into mature plants, carrying the foreign gene, expressed throughout the new plant.
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