In the gene gun method,$DNA$ is coated onto which of the following?

The role of $DNA$ ligase in the construction of a recombinant $DNA$ molecule is:

In case of $BamHI$,$H$ represents

$A$ specific recognition sequence identified by endonucleases to make cuts at specific positions within the $DNA$ is:

The first discovered restriction endonuclease that always cuts $DNA$ molecules at a particular point by recognizing a specific sequence of six base pairs is:

Two enzymes responsible for restricting the growth of bacteriophages in $E. coli$ were isolated. One was methylase and the other was restriction endonuclease. What is the significance of methylase?