In bacteria, transcription, and translation take place simultaneously. In eukaryotes, transcription takes place in the nucleus, and the pre-mRNAs then undergo processing before being moved to the cytoplasm for translation, which allows opportunities for gene control after transcription. Consequently, posttranscriptional gene regulation assumes an important role in eukaryotic cells. RNA processing and degradation is a common level of gene regulation in eukaryotes.
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