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

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

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Transcription and Regulation
What is a promoter?

A specific sequence of DNA to which RNA polymerase binds
A specific sequence of DNA to which a catabolic repressor binds
None of these
A specific DNA sequence to which a restriction endonuclease binds

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Transcription and Regulation
The transcriptional regulatory proteins in eukaryotes which induce transcription usually have

at least two distinct domains of protein structure and a DNA binding domain
at least one distinct domains of protein structure, a DNA binding domain and an activation domain
at least two distinct domains of protein structure, a DNA binding domain and an activation domain
none of these

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

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