When a gene is targeted to correct a disease by amplifying the gene,what is this process called?

What are recombinant $DNA$ vaccines? Give two examples of such vaccines. Discuss their advantages.

$ELISA$ is used to detect viruses,where:

Which of the following is commonly used as a vector for introducing a $DNA$ fragment in human lymphocytes?

$ELISA$ technique is based on the principles of antigen-antibody interaction. Can this technique be used in the molecular diagnosis of a genetic disorder,such as phenylketonuria?

$\alpha-1$ antitrypsin is