What type of biological molecules are cloning vectors?

Which restriction enzyme produces blunt ends upon cleavage?

Using recombinant technology,genes from a donor cell can be transplanted into a bacterium for $DNA$ replication and protein synthesis. The kinds of cells that can be used as a donor in this technology are

Which enzyme is used to join foreign $DNA$ to a plasmid?

In the following palindromic base sequences of $DNA$,which one can be cut easily by a particular restriction enzyme?

Cutting of a piece of $DNA$ from a plasmid was done with the help of $...A...$ enzymes,popularly known as $...B....$ Here $A$ and $B$ can be