............. technology is useful in vaccine production.

The experimental manipulation of $DNA$ of different species,producing recombinant $DNA$,is known as:

$I.$ Copy number is defined as the number of copies of a plasmid present in a cell.
$II.$ It varies from $15-100$ copies per cell. Choose the correct option regarding the above statements.

The introduction of foreign genes for improving the genotype is known as:

Which technology involves altering the chemistry of genetic material ($DNA$ and $RNA$) to introduce it into host organisms and thus change the phenotype of the host organism?

Recombinant $DNA$ technology was discovered by