Question
Biology Question on Non-Mendelian Genetics
The Ti plasmid used in genetic engineering is obtained from
A
Bacillus thuringensis
B
Agrobacterium rhizogenes
C
Agrobacterium lumifaciens
D
Escherichia coli
Answer
Agrobacterium lumifaciens
Explanation
Solution
Agrobacterium tumefaciens, bacterial genus is noted for crown gall tumor inducing ability. Oncogenic strains are host to a tumor inducing (Ti) plasmid which can be transmitted between species. A segment (T-DNA) of Ti plasmid is transmitted to plant host cell and is the immediate agent of tumour induction.