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

$DNA$ replication is aided by:

Match the columns.

Column - $I$	Column - $II$
$(a)$ Helicase	$(1)$ Joining of nucleotides
$(b)$ Gyrase	$(2)$ Opening of $DNA$
$(c)$ Primase	$(3)$ Unwinding of $DNA$
$(d)$ $DNA$ Polymerase $III$	$(4)$ $RNA$ Priming

During in vitro synthesis of $DNA$,a researcher used $2', 3'$-dideoxy cytidine triphosphate as raw nucleotide in place of $2'$-deoxy cytidine. What would be the consequence?

During $DNA$ replication, the two strands separate. Each of these acts as a template for the synthesis of a new strand. This mode of replication is called:

Describe various enzymes involved in $DNA$ replication.