Ethidium bromide stained agarose gel is exposed to $.......,$ to observe $\text{DNA}$ as bright orange coloured bands.

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

$PCR$ is used for:

The technique of bombarding plant cells with high velocity microparticles of gold or tungsten,coated with $DNA$,is known as:

What is required for the expression of a foreign gene?

Identify the given figure.