Two bacteria most useful in genetic engineering are (A) Rhizobium and Azotobacter (B) Escherichia and Agrobacterium (C) Rhizobium and Diplococcus (D) Nitrosomonas and Klebsiella
Option B.Till today, the most important in genetic engineering of plants has been the Ti plasmid of soil bacterium, Agrobacterium tumefaciens. E.Coli has been extensively used as "work horse" for genetic engineering e.g., production of humulin, somatotropin. E. coli is one of the most thoroughly studied of all living things. It is a favorite organism for genetic engineering as cultures of it can be made to produce unlimited quantities of the product of an introduced gene
