The RNA processing machinery is contained inside structures called "terminal knobs" in nascent RNA transcripts. Terminal knobs are visible in this electron micrograph of chromatin spreads from yeast.
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Gene expression is linked to RNA transcription, which cannot happen without RNA polymerase. However, this is where the similarities between prokaryote and eukaryote expression end.
If DNA is a book, then how is it read? Learn more about the DNA transcription process, where DNA is converted to RNA, a more portable set of instructions for the cell.
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