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Molecular Biology Help! In positive regulation, a(n) ______________ activates a promoter. activator repressor enhancer regulon none...

Molecular Biology Help!

In positive regulation, a(n) ______________ activates a promoter.

activator
repressor
enhancer
regulon
none of the above

In negative regulation, a(n) _____________ turns off the transcription of one or more genes.

activator
repressor
enhancer
regulon
none of the above

The _______ activator protein regulates the araBAD operon.

allolactose
cAMP-CRP
AraC
enhancer
none of the above

Three _____ protein binding sites increase rrn transcription.

promoter
Fis
AraC
cAMP-CRP
none of the above
0 0
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Answer #1

Ans:

In positive regulation, a(n) activator activates promoter.

Explanation:

- Most activators are DNA binding proteins that bind to promoter.

In negative regulation, a(n) repressor turns off the transcription of one or more genes.

Explanation:

- A repressor is a DNA or RNA binding protein that inhibits the expression of one or more genes by binding to the operator.

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