Prohibiting smoking in all public housing units nationwide would save nearly $60 million annually in property destroyed by fire and cleaning up smoking related damage to public housing units.
RNA polymerase is the core enzyme in transcription which needs proteins known as transcription factors to bind to the DNA promoter. also DNA plymerase... can't remember what about it though. DNA polymerase isn't involved in DNA transcription. However, DNA polymerase IS involved in DNA REPLICATION.
Prokaryotic RNA polymerases have 2 components, a core enzyme and a sigma factor (a.ka. sigma subunit). The sigma factor is necessary for the RNA polymerase to bind tightly to the promoter and initiate transcription. Once transcription starts, the sigma factor falls off, and the core enzyme continues copying the DNA into RNA till it reaches a terminator.