$EcoRI$ cleaves the $DNA$ strands to produce

In Recombinant $DNA$ technology,antibiotics are used:

Due to the chloramphenicol resistance gene,one is able to select a transformed cell in the presence of chloramphenicol. The chloramphenicol resistance gene in this case is called:

The sequence which is responsible for controlling the copy number of the linked $\text{DNA}$ is:

Who constructed the first $r-DNA$ molecule?

Primers are