$A$ student while extracting $DNA$ from $Aspergillus$ fungus uses . . . . . . enzyme to break open the cell wall.

Match the following enzymes with their functions:

$(a)$ Restriction endonuclease	$(i)$ Joins the $DNA$ fragments
$(b)$ Restriction exonuclease	$(ii)$ Extends primers on genomic $DNA$ template
$(c)$ $DNA$ ligase	$(iii)$ Cuts $DNA$ at specific positions
$(d)$ $Taq$ polymerase	$(iv)$ Removes nucleotides from the ends of $DNA$

Select the correct option from the following:

Which vector can clone a small fragment of $DNA$?

In recombinant $DNA$ technology,the term vector refers to a

Restriction endonuclease,an enzyme used in Genetic Engineering,is employed for:

The first restriction endonuclease type $II$,$...A..$,was isolated by Smith,Wilcox and Kelley from $...B...$ bacterium. It was found to cut $DNA$ molecules at a particular point by recognizing a specific sequence of six base pairs,known as the $...C....$. Here $A, B$ and $C$ can be: