It increases the efficiency with which $DNA$ enters the bacterium through pores in its cell wall.

Main steps in the formation of Recombinant $DNA$ are given below. Arrange these steps in a correct sequence.
$A$. Insertion of recombinant $DNA$ into the host cell
$B$. Cutting of $DNA$ at specific location by restriction enzyme
$C$. Isolation of desired $DNA$ fragment
$D$. Amplification of gene of interest using $PCR$
Choose the correct answer from the options given below:

It is used to detect $HIV$ in suspected $AIDS$ patient and detect mutations in genes in suspected cancer patient too.

Which of the following techniques is $NOT$ used for introducing $DNA$ into a host cell in $r-DNA$ technology?

Pure $DNA$ precipitated by the addition of chilled ethanol can be removed from the solution by

Select the correct statements from the following: