Question

Of the following, the two bacterias used in genetic engineering are

• A. Nitrosomonas and Nitrobacter.
• B. Escherichia and Agrobacterium.
• C. Azotobacter and Klebsiella.
• D. Rhizobium and Diplococcus..

Answer 1

The correct option is B Escherichia and Agrobacterium.

Escherichia and Agrobacterium are the two bacterias which are used in genetic engineering because of the presence of plasmids. Plasmids are self-replicating, extra-chromosomal segments of double-stranded, circular, naked DNA. Plasmids provide unique phenotypic characters to bacteria. They are independent of the main nucleoid. Some of them contain important genes like fertility factor, nif genes, resistance factors and colicinogenic factors. Plasmids are used as vectors in genetic engineering.