Which is the main enzyme for $DNA$ replication?

The enzyme $DNA$ polymerase in $E. coli$ is a $DNA$-dependent polymerase and also has the ability to proof-read the $DNA$ strand being synthesized. Explain. Discuss the dual polymerase activity.

On which template strand of $DNA$ is the new strand synthesized discontinuously?

Choose the correct statement about the direction of $DNA$ strand.

$A$ normal spontaneous rate for a single gene is one mutation in every ...... replications.

For how long should bacteria be cultured in a $^{14}N$ medium after being transferred from a $^{15}N$ medium so that the extracted $DNA$ consists of equal amounts of hybrid $DNA$ and light $DNA$?