Considering that a DNA sequence that encodes transcription termination contains a region rich in Gs and Cs that can base pair followed by a string of about six Us, devise several mechanisms that could use this information to signal the RNA polymerase to terminate transcription. For example, one might be that the separated DNA strands at the transcription point themselves form hairpins in addition to the RNA, and the three hairpins bind to sites within the polymerase to cause it to terminate.
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