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Genetic Regulation Prokaryotes

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

O
P
I
none of these

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Genetic Regulation Prokaryotes
In the presence of high levels of tryptophan

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

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Genetic Regulation Prokaryotes
Enhancers differ from promoters in that

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

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Genetic Regulation Prokaryotes
DNA is methylated at

CG sequences
TATA sequences
CAAT sequences
AC sequences

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Genetic Regulation Prokaryotes
The lac operon is translated into __________ proteins.

4
1
3
2

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Genetic Regulation Prokaryotes
What are genes?

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

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