Question

Assertion (A): Agrobacterium tumefaciens is commonly used in genetic engineering because this bacterium is associated with roots of all cereals and pulse crops.

Reason (R): A gene incorporated in the bacterial chromosomal genome gets automatically transferred to the crop with which the bacterium is associated.

Options

• Both assertion (A) and reason (R) are true, and reason is the correct explanation of assertion.

• Both assertion (A) and reason (R) are true, but reason is not the correct explanation of assertion.

• Assertion (A) is true but reason (R) is false.

• Both assertion (A) and reason (R) are false.

Answer 1

Both assertion (A) and reason (R) are false.

Explanation:

Agrobacterium tumefaciens is used as a vector because it can transfer Ti-plasmid DNA into plant cells, especially dicot plants. It is not associated with all cereals and pulses, and a gene in its chromosome is not automatically transferred to a crop.