Wednesday, August 12, 2009

Describe the process of transcription in eukaryotic cells.


Its primarily located in the nucleus, where it gets separated from the cytoplasm(in which translation occurs) near the nucleur membrane. DNA is also in the mitochondria in the cytoplasm and the mitochondria utilize a special RNA polymerase for transcription. The basal eukaryotic transcription includes: RNA polymerase and additional proteins that are necessary for the correct initiation and elogation.

TRANSCRIPTION PROCESS


Name
transcribed
RNA Polymerase I (Pol I, Pol A)
nucleolus
Larger ribosomal RNA (rRNA) (28S, 18S, 5.8S)
RNA Polymerase II (Pol II, Pol B)
nucleus
messenger RNA (mRNA) and most small nuclear RNAs (snRNAs)
RNA Polymerase III (Pol III, Pol C)
nucleus (and possibly the nucleolus-nucleoplasm interface)
transfer RNA (tRNA) and other small RNAs (including the small 5S rRNA)http://en.wikipedia.org/wiki/Eukaryotic_transcription

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