Separation of $DNA$ fragments is done by a technique known as:

By which process is a fragment of $DNA$ transferred into a bacterial host cell?

Which of the following diagrams is correct for primer annealing in $PCR$?

In $pBR322$,foreign $DNA$ is inserted using the restriction enzyme $Cla\, I$. If this recombinant plasmid is introduced into bacteria,which of the following will occur regarding growth on antibiotic-containing media?

Identify the diagram given below.

If a recombinant $DNA$ bearing a gene for resistance to Ampicillin is transferred into $E. coli$ cells,the host cells become transformed into Ampicillin-resistant cells. What happens when these $E. coli$ are grown on a medium containing Ampicillin?