Genetic engineering is possible because

Options

A. We can cut DNA at specific sites by restriction endonucleases
B. restriction endonucleases purified sites by restriction used in bacteria
C. the phenomenon of transduction in bacteria is well understood
D. we can see DNA by electron microscope

Answer

A

Explanation

Genetic engineering includes the artificial synthesis, isolation, modification, combination, additon 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 endonuclease play major role in genetic engineering as they can cut DNA at specific sites, thus allowing manipulation or modification in its sequence.