The following statements refer to differences and similarities among prokaryotic and eukaryotic transcription. Select the correct answer:
O The sigma factor is critical for initiation of transcription in eukaryotes, whereas prokaryotic RNA polymerases rely on the Pribnow box.
O Different eukaryotic RNA polymerases are designated by Greek letters; Roman numerals are used to distinguish the prokaryotic RNA polymerases.
O Eukaryotes generally possess different types of RNA polymerases, each of which is responsible for transcribing a different class of RNA. Prokaryotes have just one type of RNA polymerase.
O In both prokaryotes and eukaryotes, transcription terminations are rho-factor independent.