Question

The organism, which is used for gene transfer in higher organism is

• A. Agrobacterium tumefaciens
• B. E.coli
• C. Acetobacter aceti
• D. Bacillus thuringiensis

Answer 1

The correct option is A Agrobacterium tumefaciens

Agrobacterium tumefaciens is a pathogen of several dicot plants. It is used for the gene transfer in higher organisms. It 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. This bacterium invades plants at the site of wound, transforming them and nearby cells to form a tumor called crown gall.