What is the primary function of DNA polymerase δ (delta)?

The primary function of DNA polymerase δ (delta) is associated with DNA replication and repair. This enzyme plays a critical role during DNA synthesis, specifically in the synthesis of the lagging strand during DNA replication. It carries out this process by adding nucleotides to the growing DNA strand, thus facilitating the duplication of the genetic material.

In addition to its role in replication, DNA polymerase δ is also involved in the repair of damaged DNA. It participates in various DNA repair pathways, ensuring the integrity of the genome by correcting errors that may occur during replication or as a result of DNA damage. The enzyme's proofreading ability enhances its fidelity, allowing for the correction of misincorporated nucleotides, which is vital for maintaining genetic stability.

The other options mention functions that are either not associated with DNA polymerase δ or are functions of other types of enzymes. While DNA replication is indeed one of the primary roles of this enzyme, combining it with the function of repair provides a comprehensive picture of its importance in cellular processes.