Question

The introduction of rDNA into plants involves

(a) infection of the plant by Agrobacterium tumefaciens

(b) altering the pH of soil, heat-shocking the plants

(c) exposing the plants to cold for a brief period

(d) allowing the plant roots to stand in water

Answer 1

Correct option (a) infection of the plant by Agrobacterium tumefaciens
Explanation :

Agrobacterium tumefaciens, a pathogen of several dicot plants is able to deliver a piece of DNA known as rDNA to transform normal plant cells into a tumour and direct these tumour cells to produce the chemicals required by the pathogen.