There are special proteins that help to open up $DNA$ double helix in front of the replication fork. These proteins are:

During replication of a bacterial chromosome,$DNA$ synthesis starts from a replication origin site and:

Who provided the experimental proof that $DNA$ replicates in a semi-conservative manner?

$A$ $DNA$ molecule in which both strands have radioactive thymidine is allowed to duplicate in an environment containing non-radioactive thymidine. What will be the correct number of $DNA$ molecules that contain some radioactive thymidine after three duplications?

Okazaki fragments are synthesized on:

$A$: 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.