Complete the following analogy: Agrobacterium tumefaciens: Transforms normal plant cells into tumor :: Retrovirus : ______ (A) Transforms normal animal cells into cancerous cells (B) Transforms normal animal cells into infective cells (C) Transforms normal plant cells into totipotent cells (D) Transforms normal animal cells into totipotent cells
Option A. Agrobacterium tumefaciens, a pathogen of several dicot plants is able to deliver a piece of DNA known as 'T-DNA' to transform normal plant cells into tumour and direct these cells to produce the chemicals required by pathogen. Similarly , retroviruses in animal cell have the ability to produce cancerous cells from normal cells.
