What are the different types of RNA polymerases and their promoters?
There are three different types of RNA polymerases in eukaryotic cells: RNA polymerase I, II, and III. Each type is responsible for transcribing a specific set of genes. RNA polymerase I transcribes ribosomal RNA genes, RNA polymerase II transcribes protein-coding genes, and RNA polymerase III transcribes small structural RNA genes. The promoters for each type of RNA polymerase are different and contain specific sequences that are recognized by the polymerase to initiate transcription.