Final answer:
The primosome complex is responsible for loading DNA polymerase III onto the DNA template at the replication fork during theta replication, a critical step for DNA synthesis.
Step-by-step explanation:
In theta replication, the primosome complex helps to load the DNA polymerase III enzyme onto the DNA template at the replication fork.
The primosome is essential for laying down an RNA primer which DNA polymerase III uses to synthesize the daughter DNA strand.
This event is crucial in the replication process as it allows DNA polymerase III to extend the leading strand continuously and the lagging strand in the form of Okazaki fragments.
The loading of DNA polymerase III is facilitated by a coordinated effort involving several other proteins and enzymes that unwind the DNA, stabilize the single-stranded DNA, and relieve the tension caused by the unwinding of the DNA helix.