Final answer:
The two common features of DNA replicators are specific origins of replication and the use of specialized enzymes during replication. Prokaryotes have singular origin points rich in AT sequences, while eukaryotes have multiple origins, using enzymes such as DNA polymerases alpha, delta, and epsilon.
Step-by-step explanation:
The two common features shared by the DNA sequences of known replicators are the presence of specific nucleotide sequences at the origins of replication and the use of specific enzymes involved in the replication process. In prokaryotes, such as E. coli, there is typically a single origin of replication that is rich in AT sequences. This site is recognized by proteins that bind to it, allowing the enzyme helicase to unwind the DNA. This is necessary to form replication forks where DNA polymerases can replicate the DNA.
In eukaryotes, the replication process involves multiple origins of replication due to the more complex and larger genome. DNA polymerases like DNA polymerases alpha, delta, and epsilon, as well as accessory proteins like PCNA, are part of the replication machinery. The replication process is further complicated by the DNA being tightly packed with histones into nucleosomes, requiring additional steps for the DNA to become accessible to replication enzymes.
In the context of viruses and plasmids, variations on these common features are present, reflecting a diversity of replication strategies, yet maintaining the core mechanisms of replication.