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Genetic Regulation Prokaryotes

Genetic Regulation Prokaryotes
What are genes?

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

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Genetic Regulation Prokaryotes
In the presence of high levels of tryptophan

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

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Genetic Regulation Prokaryotes
Sex lethal (sxl) in Drosophila is transcribed when

the X autosome balance is less than 0.5
None of these
the X autosome balance is 1 or greater
the X autosome balance equals 0.5

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

none of these
O
I
P

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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?

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

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

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

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