During $DNA$ replication, the term leading template is applied to the one which replicates itself in $A$ and the replication is $B$.

The direction of $DNA$ replication is:

Given below are two statements,one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R).$
Assertion $(A):$ $\text{DNA}$ replication occurs within a small opening of the $\text{DNA}$ helix,referred to as the replication fork.
Reason $(R):$ During transcription,the discontinuously synthesized fragments of $\text{DNA}$ are joined by the enzyme $\text{DNA}$ ligase.
In the light of the above statements,choose the most appropriate answer from the options given below:

The mode of $DNA$ replication is .....

During the replication of a bacterial chromosome,$DNA$ synthesis starts at the origin of replication and proceeds in:

Which is the main enzyme for $DNA$ replication?