In a continuous culture system,cells can be maintained in which physiological phase?

In gel electrophoresis,separated $DNA$ fragments can be visualized with the help of:

If a recombinant $DNA$ bearing a gene for resistance to Ampicillin is transferred into $E. coli$ cells,the host cells become transformed into Ampicillin-resistant cells. What happens when these $E. coli$ are grown on a medium containing Ampicillin?

Which of the following is not used in the Southern hybridization technique for chromosomal $DNA$ analysis?

In which method are host cells bombarded with high-velocity micro-particles of gold or tungsten coated with $DNA$?

$A$ simple stirred-tank bioreactor is shown below. Identify $A, B, C, D$,and $E$.