When a protein-encoding gene is expressed in a heterologous host, it is called a:

In the case of polymerase chain reaction $(PCR)$,what are the temperatures required for the following steps?
$A.$ Denaturation
$B.$ Annealing
$C.$ Extension

Consider the following statements about $PCR$:
$I.$ Polymerase Chain Reaction $(PCR)$ is a technique of synthesizing multiple copies of the desired gene in vitro.
$II.$ This technique was developed by Kary Mullis in $1985$.
$III.$ $A$ single $PCR$ amplification cycle involves three basic steps: denaturation,annealing,and extension.
Which of the statements given above are correct?

Stirred-tank bioreactors have been designed for:

The flowchart given below represents the process of recombinant $DNA$ technology. Identify $A$,$B$,and $C$.

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