$DNA$ precipitation out of a mixture of biomolecules can be achieved by treatment with

Select the option that represents the correct sequence of steps in $r-DNA$ technology.
$(1)$ Insertion of $r-DNA$ into the host
$(2)$ Isolation of $DNA$
$(3)$ Ligation of $DNA$ fragment into the vector
$(4)$ Culturing the host cells in a medium at a large scale and extraction of the desired product
$(5)$ Isolation of the desired $DNA$ fragment
$(6)$ Fragmentation of $DNA$ by restriction endonucleases

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 is required for the amplification of a gene of interest by $PCR$?

How does one visualise $DNA$ on an agarose gel?

$A$: To extract $RNA$ from tomato cells,it must first be treated with cellulase,protease,and then deoxyribonuclease.
$R$: Deoxyribonuclease will digest $DNA$ while $RNA$ will be intact.