In which of the following methods is a probe allowed to hybridize to its complementary $DNA$ in a clone of cells?

In the process of recombinant $DNA$ technology, proteins and lipids are removed from the medium by which enzymes, respectively?

Which of the following is the correct sequence of steps in the Polymerase Chain Reaction $(PCR)$?

When a foreign $DNA$ is introduced into an organism,how is it maintained in the host and how is it transferred to the progeny of the organism?

Silencing of specific mRNA in RNAi is by

The different basic steps of genetic engineering are given below randomly:
$I.$ Identification of $DNA$ with desirable genes
$II.$ Gene transfer
$III.$ Maintenance of $DNA$ in host and gene cloning
$IV.$ Introduction of $DNA$ into host to form recombinant $DNA$
Which of the following represents the correct sequence of steps?