Read the following statements and choose the correct option: 1. Agrobacterium tumifaciens, a pathogen of several dicot plants is able to deliver a piece of DNA known as ‘T-DNA’ to transform normal plant cells into a tumor 2. Retroviruses in plants have the ability to transform normal cells into cancerous cells. 3. The tumor inducing (Ti) plasmid of Agrobacterium tumifaciens has now been modified into a cloning vector

Step-by-step solution

Agrobacterium tumifaciens, a pathogen of several dicot plants is able to deliver a piece of DNA known as ‘T-DNA’ to transform normal plant cells into a tumor and direct these tumor cells to produce the chemicals required by the pathogen. Similarly, retroviruses in animals have the ability to transform normal cells into cancerous cells. A better understanding of the art of delivering genes by pathogens in their eukaryotic hosts has generated knowledge to transform these tools of pathogens into useful vectors for del