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

Which of the following foreign $DNA$ cannot multiply within a host cell?

Would you choose an exonuclease while producing a recombinant $DNA$ molecule?

Using recombinant technology,genes from a donor cell can be transplanted into a bacterium for $DNA$ replication and protein synthesis. The kinds of cells that can be used as a donor in this technology are

If a foreign $DNA$ fragment is inserted into the $BamHI$ site of $pBR322$ to create $r-DNA$,in which medium will the recombinants not grow?

$pBR322$ contains the recognition sites for which of the following endonucleases at the $amp^R$ site?