GENETIC REGULATION PROKARYOTES QUIZ

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

The bacterial host will lyse immediately

Early genes will not be translated

Infection will proceed as usual

Middle genes will not be transcribed

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Tubulin is regulated by

binding of tubulin to DNA

splicing of the tubulin transcript

binding of tubulin to tubulin mRNA

binding of tubulin to the tubulin translational product

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The lac operon is transcribed in which segments?

3

4

1

2

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Which of the following is not part of the lac operon?

P

I

none of these

O

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Sex determination in Drosophila involves

methylation

alternate splicing

none of these

gene amplification

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Catabolite activating protein exerts __________ control on transcription of the lac operon genes.

none of these

may be positive or negative

negative

positive

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What are genes?

All of these

The functional unit of inheritance

A fragment of DNA

A portion of a chromosome

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Methylated gene are

dynamic

silent

either (a) or (b)

active

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Enhancers differ from promoters in that

they initiate transcription

they are adjacent to the start codon

their orientation can be inverted without effect

they are restricted to a specific gene

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DNA is methylated at

AC sequences

CAAT sequences

TATA sequences

CG sequences

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