Choose the bacterium which is not a source of $REN$.

How many restriction sites for different restriction enzymes does the cloning vector $pBR322$ contain?

Which of the following methods are used for the analysis of Restriction Fragment Length Polymorphism $(RFLP)$?
$1$. Electrophoresis
$2$. Electroporation
$3$. Methylation
$4$. Restriction digestion

Plasmids are composed of

Crown gall disease in plants is caused by

$K_{12}$ plasmid was studied first in