Transcription and Regulation
Transcription of each set of rRNA genes by RNA polymerasel produces

a single 5S rRNA precursor molecule
a single 28S rRNA precursor molecule
a single 18S rRNA precursor molecule
a single 45S rRNA precursor molecule

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Transcription and Regulation
Multiple copies of 5S genes, located at a chromosomal site distinct from the other rRNA genes

are transcribed by rRNA polymerase III and the 5S rRNA
are transcribed by DNA polymerase I
are transcribed by rRNA polymerase I and the 5S rRNA
are transcribed by rRNA polymerase II

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Transcription and Regulation
The function of the sigma factor of RNA polymerase is to

assure that translation begins at the proper point
assure that transcription ends at the proper point
assure that translation ends at the proper point
assure that transcription begins at the proper point

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