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 45S rRNA precursor molecule
a single 18S 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 rRNA polymerase I and the 5S rRNA
are transcribed by rRNA polymerase II
are transcribed by DNA polymerase I

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Transcription and Regulation
Which of the following conditions would cause the release of the lac repressor protein from the lac operator site on DNA?

Both (b) and (c)
Presence of lactose in the growth media
Presence of glucose in the growth media
Presence of IPTG (isopropyl thiogalactoside) in the growth media

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Transcription and Regulation
What is a promoter?

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

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