Which of the following is a plasmid?

Which of the following enzymes are used to join bits of $DNA$?

Which enzyme is used to digest the cell wall of fungi?

The diagram below represents a schematic of recombinant $DNA$ technology. Which enzymes are responsible for the processes $P$ and $Q$ respectively?
$\quad\quad P\quad\quad\quad Q$

The first discovered restriction endonuclease that always cuts $DNA$ molecules at a particular point by recognizing a specific sequence of six base pairs is:

Agarose is extracted from which of the following?