Which one of the following equipments is essentially required for growing microbes on a large scale for the industrial production of enzymes?

Which of the following method$(s)$ is used to introduce foreign $DNA$ into host cells?

The full form of $PCR$ is ...........

Given below are two statements.
Statement $I$ - The isolated $DNA$ of donor organism is cleaved by suitable restriction endonuclease to form $DNA$ fragments with cohesive staggered or blunt ends.
Statement $II$ - The foreign $DNA$ or passenger $DNA$ can also be obtained directly from genomic or cDNA library.
In the light of above statements,select the correct option given below:

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

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