$Taq$ polymerase is isolated from a bacterium,$Thermus$ $aquaticus$.

Create a chart (with diagrammatic representation) showing a restriction enzyme,the substrate $DNA$ on which it acts,the site at which it cuts $DNA$,and the product it produces.

In genetic engineering,two bacteria are very useful. They are ......

Plasmids are used as vectors because ........

What is a palindromic sequence?

$A$ single-stranded $DNA$ or $RNA$ tagged with a radioactive molecule is called a .....