NEET Biology question

Which organism is used to transfer T-DNA into plant cells? **[NEET 2013]**

(A)Streptomyces hygroscopicus
(B)Agrobacterium tumefaciensCorrect
(C)Salmonella typhi
(D)Escherichia coli

Answer: (B)

Solution

*Agrobacterium tumefaciens*, the causative agent of crown gall disease in dicot plants, carries a Ti (tumour-inducing) plasmid whose T-DNA segment is naturally transferred into and integrated within the plant host genome — this natural gene-transfer ability has been exploited and engineered (with the oncogenic genes

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Question ID VK-125320