Multiple choice From which of the following organisms are Ti plasmids isolated? Bacillus thuringiensis Rhizobium leguminosarum Agrobacterium tumefaciens Thermus aquaticus Escherichia coli Reveal answer Fill a bubble to check yourself C Correct answer Explanation Ti plasmids are isolated from Agrobacterium tumefaciens. Tumor inducing plasmids are double stranded circular DNA present in Agrobacterium tumefaciens.