Restriction enzymes are isolated chiefly from:

Restriction enzymes are:

Which restriction enzyme produces blunt ends upon cleavage?

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

In $pBR322$,which of the following codes for the proteins involved in the replication of the plasmid?

Select the option that excludes characteristics applicable to plasmids:
$(a)$. Circular $DNA$
$(b)$. Linear $DNA$
$(c)$. Present in all bacteria
$(d)$. Contain essential genes
$(e)$. Extra chromosomal self-replicating