We know that the nitrogen bases of DNA, T-A and C-G, act as a template in building new DNA molecules during replication. But before replication can begin, an enzyme called ________ must _____________, starting at the replication origin.
a) A helicase; split open the DNA, helicase; split open the DNA
b) DNA primase; split open the DNA, DNA primase; split open the DNA
c) DNA polymerase; match nitrogen bases , DNA polymerase; match nitrogen bases
d) Ligase; insert the correct nitrogen , basesligase; insert the correct nitrogen bases