Question

Two microbes found to be very useful in genetic engineering are

• A. Escherichia coli and Agrobacterium tumefaciens
• B. Crown gall bacterium and Caenorhabditis elegans
• C. Vibrio cholerae and a tailed bacteriophage
• D. Diplococcus sp. and Pseudomonas sp.

Answer 1

The correct option is A

Escherichia coli and Agrobacterium tumefaciens

Escherichia coli possesses plasmid which encodes genes that may act as selectable markers in transformations. Agrobacterium tumefaciens possesses Ti plasmid that induces tumour formation. These have been used as vectors to transfer foreign genes of interest into the target animal and plant cells.