The "molecular scissors" used in genetic engineering is

The first restriction endonuclease type $II$,$...A..$,was isolated by Smith,Wilcox and Kelley from $...B...$ bacterium. It was found to cut $DNA$ molecules at a particular point by recognizing a specific sequence of six base pairs,known as the $...C....$. Here $A, B$ and $C$ can be:

Explain restriction enzymes and their nomenclature.

To isolate $DNA$ from fungal cells,bacterial cells,and plant cells,the enzymes required are respectively:

Why is a vector necessary for obtaining the desired product in recombinant $DNA$ technology?

What is used as a medium in gel electrophoresis?