Chimeric $DNA$ is

The critical research areas of biotechnology are:
$I$. Providing the best catalyst as an improved organism,usually a microbe or pure enzyme.
$II$. Creating optimal conditions through engineering for a catalyst to act.
$III$. Downstream processing technologies.
$IV$. Multiple Ovulation Embryo Transfer Technology $(MOET)$.
Which of the statements given above are correct?

Give the importance of the origin of replication in a chromosome.

The branch of science dealing with genetic engineering is:

Recombinant $DNA$ technology was discovered by

Recombinant $DNA$ technology is related with: