Hind $II$ cuts the $\text{DNA}$ molecule at a particular point by recognizing a specific sequence of how many base pairs?

Which of the following is used in genetic engineering?

Select the appropriate option regarding $r-DNA$.

$cDNA$ probes are copied from the messenger $RNA$ $(mRNA)$ molecules with the help of:

Which enzyme is required to prevent unwanted self-ligation of vector $DNA$ molecules in recombinant $DNA$ technology?

Who discovered that restriction enzymes have the capability of cutting $DNA$ strands in a particular fashion,which left what has become known as 'sticky ends' on the strands?