Question
Biology Question on DNA Replication
The tumor inducing capacity of Agrobacterium - tumaefaciens is located in large extra chromosomal plasmids called
A
pBR 322
B
Ti plasmid
C
Ri plasmid
D
lambda phage
Answer
Ti plasmid
Explanation
Solution
Answer (b) Ti plasmid
Ti- plasmid. It is the tumour inducing plasmid and is a circular DNA molecule that is found in the strains of Agrobacterium tumefaciens. It will help in the transfer of the genetic material into the genome of the plants. The plasmid also have oncogenes that cause the abnormal growth of the galls in the infected plants and also the virulence genes. These genes help in the interaction between the bacteria and the plants.