For providing evidence in favour of semiconservative way of $DNA$ replication, Taylor, Woods, and Hughes performed experiments on:

In the process of $DNA$ replication, the mechanism where two strands separate and each serves as a template for the synthesis of a new strand is known as .......

Match the following columns:

Column-$I$ (Enzyme)	Column-$II$ (Function)
$P$. $DNA$ Polymerase	$I$. Synthesizes $DNA$ strand
$Q$. $DNA$ Helicase	$II$. Breaks $H$-bonds of $DNA$ strands
$R$. $DNA$ Ligase	$III$. Joins $DNA$ fragments

Which one of the following is not a process of $DNA$ replication?

Identify parts $A, B, C, D$ in the figure given below:

$A$: Kornberg enzyme is associated with the removal of primers and thymine dimers.
$R$: $DNA$ polymerase $I$ performs exonuclease activity in $5^{\prime} \rightarrow 3^{\prime}$ and $3^{\prime} \rightarrow 5^{\prime}$ directions.