Final answer:
The correct answer is D) Small nuclear RNAs (snRNAs). Helicase, topoisomerase, primase, and small nuclear RNAs (snRNAs) are all involved in the mechanism of DNA replication.
Step-by-step explanation:
The correct answer is D) Small nuclear RNAs (snRNAs).
In the process of DNA replication, the separation of strands and coupling of free nucleic acids is carried out by various enzymes and molecules.
Helicase is responsible for separating the DNA strands at the origin of replication, while topoisomerase breaks and reforms DNA's sugar backbone ahead of the replication fork. Single-stranded binding proteins prevent the reformation of DNA.
Primase synthesizes an RNA primer, which is then used by DNA polymerase to form a daughter strand.
Small nuclear RNAs (snRNAs) are involved in the mechanism of replication. They are part of small nuclear ribonucleoproteins (snRNPs) and play a role in splicing and processing of mRNA.