Question

Genetic engineering is possible because:

• A. We can cut DNA at specific sites by endonuclease like DNAase I.
  
• B. Restriction endonuclease purified from bacteria can be used in vitro.
  
• C. The phenomenon of transduction in bacteria is well understood.
• D. We can see DNA by an electron microscope.

Answer 1

The correct option is B

Restriction endonuclease purified from bacteria can be used in vitro.

Genetic engineering is possible because the restriction enzymes purified from bacteria can be used in the laboratory to cut DNA at desired locations. Because we can cut the DNA at desired locations we can get the required fragment of DNA for insertion into some other organism.