Final answer:
The sliding ring protein is necessary during DNA replication to hold the DNA polymerase in place and ensure efficient and accurate replication of the DNA molecule.
Step-by-step explanation:
The sliding ring protein is necessary during DNA replication because it functions as a sliding clamp that holds the DNA polymerase in place as it adds nucleotides to the growing DNA strand. This helps to ensure efficient and accurate replication of the DNA molecule. The sliding clamp protein, along with other proteins such as helicase and topoisomerase, play crucial roles in unwinding the DNA and preventing overwinding of the DNA double helix during replication.