The primer extension during $PCR$ cycle requires the temperature range of . . . . . . .

Select the correct sequence for $PCR$ (Polymerase Chain Reaction).

The components of a bioreactor are:
$I.$ An agitator system
$II.$ An oxygen delivery system
$III.$ Foam control system
$IV.$ Temperature control system
$V.$ $pH$ control system
$VI.$ Sampling ports to withdraw cultures periodically
Choose the correct option.

$A$ recombinant $DNA$ molecule was created by ligating a gene to a plasmid vector. By mistake,an exonuclease was added to the tube containing the recombinant $DNA$. How does this affect the next step in the experiment,i.e.,bacterial transformation?

What is the first step in the Southern blot technique?

Describe the method for the isolation of genetic material,$DNA$.