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NEET Biology QUESTION #7243
Question 1
Two microbes found to be very useful in genetic engineering are:
  • <em>Diplococcus</em> sp. and <em>Pseudomonas</em> sp.
  • Crown gall bacterium and <em>Caenorhabditis elegans</em>
  • <em>Escherichia coli</em> and <em>Agrobacterium tumefaciens</em>✔️
  • <em>Vibrio cholerae</em> and a tailed bacteriophage
Correct Answer Explanation
E. coli is the workhorse of genetic engineering — used for cloning, protein expression, and plasmid propagation. Agrobacterium tumefaciens is used to introduce foreign genes into plant cells via its Ti plasmid. Together they are the most commonly used microbes in genetic engineering.