Polymerase chain reaction $\text{(PCR)}$ amplifies $\text{DNA}$ following the equation:

In which step of $PCR$ do the primers anneal to the $DNA$ template?

Identify the following bioreactors.
$P \quad\quad Q$

What are the full forms of $ELISA$ and $PCR$?

The master plate in the replica plating experiment contained the:

Assertion : Insertion of recombinant $DNA$ within the coding sequence of $\beta -$ galactosidase results in colourless colonies.
Reason : Presence of insert results in inactivation of enzyme $\beta -$ galactosidase known as insertional inactivation.