NEET 2006 Biology question

Two microbes found to be very useful in genetic engineering are-

(1)Escherichia coli and Agrobacterium tumefaciensCorrect
(2)Vibrio cholerae and a tailed bacteriophage
(3)Diplococcus sp. and Pseudomonas sp.
(4)Crown gall bacterium and Caenorhabditis elegans

Answer: (1)

Solution

Escherichia coli is the workhorse host for cloning vectors (plasmids such as pBR322) and Agrobacterium tumefaciens, with its Ti plasmid, is the natural vector for transferring genes into plant cells; so (1) is correct. Vibrio cholerae and

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Question ID VK-089691