Which bond does $DNA$ helicase break in $DNA$?

Which bonds does helicase break in $DNA$?

Depending upon the chemical nature of the template ($DNA$ or $RNA$) and the nature of nucleic acids synthesized from it ($DNA$ or $RNA$),list the types of nucleic acid polymerases.

Identify the enzymes that synthesize $DNA$ from $RNA$.

New strand on a $DNA$ template is initiated 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