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Genetic Regulation Prokaryotes

Genetic Regulation Prokaryotes
Which of the following is not part of the lac operon?

P
I
none of these
O

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Genetic Regulation Prokaryotes
In the presence of high levels of tryptophan

attenuator allows transcription of trp structural genes
attenuator terminates transcription
attenuator propogates transcription
None of these

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Genetic Regulation Prokaryotes
Genes which need to be coordinately regulated but are not in operons may be regulated by

GC regions
common transcription factor binding domains
CAAT regions
TATA boxes

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Genetic Regulation Prokaryotes
The lac operon is transcribed in which segments?

1
2
4
3

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Genetic Regulation Prokaryotes
Enhancers differ from promoters in that

they are adjacent to the start codon
they are restricted to a specific gene
they initiate transcription
their orientation can be inverted without effect

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Genetic Regulation Prokaryotes
Which of the following occur in the presence of glucose?

lac Z gene expression is increased
cAMP increases
None of these
Binding of CAP-cAMP complex to the promoter area decreases

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