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Genetic Regulation Prokaryotes

Genetic Regulation Prokaryotes
Sex determination in Drosophila involves

alternate splicing
none of these
methylation
gene amplification

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Genetic Regulation Prokaryotes
Enhancers differ from promoters in that

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

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

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

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Genetic Regulation Prokaryotes
Which of the following is not a transcription factor?

Leucine zipper proteins
Helix-turn-helix proteins
Steroid hormones
Zinc finger proteins

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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
The bacterial host will lyse immediately
Middle genes will not be transcribed

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Genetic Regulation Prokaryotes
In the presence of high levels of tryptophan

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

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