Therefore, while bacteria accomplish transcription of all genes using a single kind of RNA polymerase, the use of different sigma factor subunits provides an extra level of control. Eukaryotic ...

Three different types of RNA polymerase exist in eukaryotic cells ... the genes for one small rRNA, plus the transfer RNAs that play a key role in the translation process, as well as other ...

Eukaryotic DNA is organized into structural units called nucleosomes which are comprised of DNA wrapped around histone proteins. Histones are the main protein components of chromatin and not only ...