Question

Genetic engineering is possible because :

• A. We can see DNA by electron, microscope
• B. The phenomenon of transduction in bacteria is well understood
• C. We can cut DNA at specific sites by restriction endonucleases
• D. Restriction endonucleases purified from virus can be used in bacteria

Answer 1

The correct option is D Restriction endonucleases purified from virus can be used in bacteria

Genetic engineering is the artificial synthesis, isolation, modification, combination, addition and repair of the genetic material (DNA) to alter the phenotype of the host organism to suit human needs. It is the manipulation of genes by man in vitro. Restriction endonucleases play major role in genetic engineering as they can cut DNA at specific sites.

• Genetic engineering is also called genetic modification.
• This method involves the manipulation of the genome of any organism using biotechnology techniques.
• DNases which act on specific positions or sequences on the DNA are called as restriction endonucleases.
• The sequences which are recognised by the restriction endonucleases or restriction enzymes (RE) are called as recognition sequences restriction sites.
• These restriction enzymes plays important role in genetic engineering.

So, the correct answer is option B