Final answer:
Prokaryotic RNA polymerase holoenzyme is composed of α, α, β, β', and σ subunits, with the σ subunit key to transcription initiation. Eukaryotic DNA replication involves enzymes like DNA polymerase alpha, delta, and epsilon.
Step-by-step explanation:
The student's question seems to be focused on the components of prokaryotic RNA polymerase and potentially their functions in DNA replication in eukaryotes. For prokaryotes, the RNA polymerase holoenzyme is composed of five polypeptide subunits: α, α, β, β', and σ, with σ being involved only in transcription initiation. In eukaryotes, the replication enzymes include DNA polymerase alpha (similar to prokaryotic DNA polymerase-I), DNA polymerase delta (similar to DNA polymerase-III), and DNA polymerase epsilon (similar to DNA polymerase-II).