In the presence of a chromogenic substrate,recombinant bacteria appear as .......

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 of the following is not present in a bioreactor?

Which chemical is utilised during the isolation of $DNA$ at the end of precipitation?

Bioreactors are useful in

What type of method is the $PCR$ technique?