
Operon Function and Regulation
Interactive Video
•
Biology, Science, Chemistry
•
9th - 10th Grade
•
Practice Problem
•
Hard
Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary difference between bacterial and eukaryotic gene expression?
Bacteria use transcription factors like eukaryotes.
Bacteria have histone proteins for chromatin structure.
Bacteria use operons instead of transcription factors.
Bacteria do not regulate gene expression.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of RNA polymerase in an operon?
It attaches to the operator to start transcription.
It degrades mRNA after transcription.
It binds to the promoter to transcribe mRNA.
It inhibits the transcription of mRNA.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the presence of tryptophan affect the operon responsible for its synthesis?
Tryptophan activates the operon.
Tryptophan acts as a repressor to turn off the operon.
Tryptophan has no effect on the operon.
Tryptophan enhances RNA polymerase activity.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the function of a repressor protein in a repressible operon?
It enhances the transcription of mRNA.
It binds to the promoter to initiate transcription.
It degrades the mRNA after transcription.
It blocks RNA polymerase from transcribing mRNA.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of the regulatory gene in operon function?
It enhances the activity of RNA polymerase.
It produces the repressor protein continuously.
It degrades the repressor protein.
It codes for the enzymes in the operon.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does lactose presence affect the lac operon?
Lactose activates the lac operon by removing the repressor.
Lactose turns off the lac operon.
Lactose has no effect on the lac operon.
Lactose degrades the mRNA produced by the lac operon.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the function of allolactose in the lac operon?
It acts as a repressor to turn off the operon.
It acts as an inducer to deactivate the repressor protein.
It enhances the transcription of mRNA.
It degrades the enzymes produced by the operon.
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