Final answer:
In the context of DNA replication in bacteria, DNA pol III is mainly responsible for synthesizing new DNA strands, whereas DNA pol I and DNA pol II are primarily repair-focused. For lesion bypass, specialized DNA polymerases like DNA pol IV and DNA pol V in E. coli are involved in facilitating replication past DNA damage.
Step-by-step explanation:
The question poses a scenario on lesion bypass in DNA replication, which concerns the functioning of DNA polymerase enzymes. In the process of DNA replication in bacteria, DNA pol I, DNA pol II, and DNA pol III each play distinct roles. Among these, DNA pol III is primarily responsible for adding nucleotides to the growing DNA strand during synthesis. DNA pol I, while it does perform some synthesis, is chiefly involved in repair mechanisms, like removing RNA primers with its 5'→3' exonuclease activity and filling in the gaps. DNA pol II also contributes to the DNA repair process.
During lesion bypass, a mechanism that allows the replication machinery to bypass a lesion or damage on the DNA template strand, specialized DNA polymerases, such as DNA pol IV and DNA pol V in E. coli, are typically recruited. These polymerases can insert nucleotides opposite the damaged base so that replication can continue. However, the original question does not specify the organism, and the precise DNA polymerase required for lesion bypass may vary across different organisms.