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Genetic Regulation Prokaryotes

Genetic Regulation Prokaryotes
What are genes?

All of these
A fragment of DNA
A portion of a chromosome
The functional unit of inheritance

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Genetic Regulation Prokaryotes
Enhancers differ from promoters in that

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

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Genetic Regulation Prokaryotes
In the presence of tryptophan in the cell, the repressor is __________

bound to DNA
bound to tryptophan
bound to both DNA and tryptophan
bound to neither tryptophan nor DNA

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Genetic Regulation Prokaryotes
A frameshift mutation occurs in the sigma subunit gene transcribed as part of SPOl early genes. What will be the immediate result?

Middle genes will not be transcribed
Early genes will not be translated
Infection will proceed as usual
The bacterial host will lyse immediately

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Genetic Regulation Prokaryotes
Sex hormones activate transcription of specific genes by

binding to DNA promoter region
binding to a transcription factor
binding to RNA polymerase
binding to DNA enhancer region

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Genetic Regulation Prokaryotes
In the presence of high levels of tryptophan

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

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