The given figure is the diagrammatic representation of the $E. coli$ vector $pBR322$. Which one of the given options correctly identifies its certain component$(s)$?

Select the correct option regarding vectors used in recombinant $DNA$ technology.

Given below are two statements:
Statement $I:$
Restriction endonucleases recognise specific sequences to cut $DNA$,known as palindromic nucleotide sequences.
Statement $II:$
Restriction endonucleases cut the $DNA$ 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 gene of interest was cloned at the $Sal I$ site in $pBR322$. The recombinant plasmid will exhibit susceptibility to:

What is the specific recognition sequence of a restriction enzyme called?

Restriction enzymes belong to which class of enzymes?