The characteristics of a molecular probe are
$I.$ very long molecule
$II.$ double-stranded
$III.$ $DNA$ or $RNA$
$IV.$ complementary to a part of the desired gene
The correct pair is

Which enzyme is used to release $DNA$ from a bacterial cell?

Which of the following restriction enzymes produces blunt ends?

Restriction enzymes that are used in the construction of recombinant $DNA$ are endonucleases which cut the $DNA$ at 'specific-recognition sequence'. What would be the disadvantage if they do not cut the $DNA$ at specific-recognition sequence?

The most thoroughly studied of the known bacteria-plant interaction is the:

Restriction endonuclease enzymes are used to: