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Genetic Regulation Prokaryotes

Genetic Regulation Prokaryotes
What are genes?

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

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

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Genetic Regulation Prokaryotes
In the presence of high levels of tryptophan

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

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

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

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Genetic Regulation Prokaryotes
Methylated gene are

either (a) or (b)
dynamic
active
silent

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Genetic Regulation Prokaryotes
A mutation in the tip binding site of the repressor would result in

constitutive trp operon expression
None of these
inducible trp operon expression
no operon expression

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