Question

Transgenic plants are produced by using Ti plasmid from the

• A. Agrobacterium tumefaciens
• B. E.coli
• C. Bacteriophage
• D. Agrobacterium varians

Answer 1

The correct option is A Agrobacterium tumefaciens

A Ti or tumour inducing plasmid is a circular plasmid that is a part of the genetic equipment that Agrobacterium tumefaciens and Agrobacterium rhizogenes use to transduce its genetic material to plants. The Ti plasmid is lost when Agrobacterium is grown above 28${}^o$C. Such, cured bacteria do not induce crown galls, i.e., they become avirulent.