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Transcription and Regulation

Transcription and Regulation
Transcription begins

upstream from the start codon
none of these
at the start codon
downstream from the start codon

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Transcription and Regulation
Immediately after transcription

both (a) and (b)
a poly adenylation signal is added
a methylated guanine cap is added to the 31 end of the transcript
a methylated guanine cap is added to the 51 end of the transcript

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Transcription and Regulation
Promoters for tRNAs are located

both (a) and (b)
upstream from the start codon
none of these
downstream from the start codon

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Transcription and Regulation
Enhancers are regions that

are adjacent to the TATA box
bind RNA polymerase
modulate transcription
are CAT box binding proteins

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Transcription and Regulation
In eukaryotes, there are three different RNA polymerases. The RNA polymerase responsible for transcription of mRNA is

RNA polymerase III
none of these
RNA polymerase I
RNA polymerase II

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Transcription and Regulation
The closed complex at bacterial promoters is

in equilibrium with free RNA polymerase and the promoter
not affected by activator proteins
bound more tightly when repressors are present
not affected by promoter mutations

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