Which enzymes are responsible for the breakdown of bacterial,plant,and fungal cell walls,respectively?

Choose the correct pair from the following:

Given below are two statements :-
Statement-$I$ : Restriction endonucleases recognize specific sequences to cut $\text{DNA}$ known as selectable nucleotide sequences.
Statement-$II$ : Restriction endonucleases cut the $\text{DNA}$ strand a little away from the centre of the palindromic site.
In the light of the above statements,choose the most appropriate answer from the options given below :-

The function of the 'ori' site in a vector is to

Choose the correct option based on the copy number capacity in a bacterial cell.

What is $pBR322$?