A) Agrobacterium tumefaciens comes in contact with the plant
B) Agrobacterium rhizogenes come$Jn contact with the plant
C) a specific part of DNA from the Ti-plasmid gets fntegrated with the plant chromosome
D) a specific part of DNA from the Ri-plasmid gets integrated with the plant chromosome
Correct Answer: C
Solution :
Crown gall is a disease of dicotyledonous plants caused by the bacterium Agrobactenum tumefaciens. This pathogen infects the plant through its Ti-plasmid. The Ti-plasmid integrates a segment of its DNA, known as T- DNA, into the chromosomal DNA of its host plant cells to transform normal host cells into cancerous (tumour producing) cells.
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