Final answer:
DnaB helicase, recruited by primase, is crucial for the separation of DNA strands at the origin of replication and the subsequent actions of the primosome in DNA replication.
Step-by-step explanation:
The DnaB protein is a helicase that is recruited by primase to propel the primosome, which is essential for DNA replication. As a primosome constituent, the DnaB helicase separates the DNA strands at the origin of replication using the energy from ATP hydrolysis to open up the DNA helix. This leads to the formation of replication forks where topoisomerases relieve the resulting supercoiling pressure ahead of these forks. Primase synthesizes RNA primers, providing a starting point for DNA polymerase to synthesize the new DNA strand. On the lagging strand, synthesis happens in short sections known as Okazaki fragments, which are later joined together by DNA ligase.