
Gene Regulation and the Lac Operon
Interactive Video
•
Biology, Science
•
9th - 12th Grade
•
Medium

Emma Peterson
Used 15+ times
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important for cells to regulate gene expression?
To ensure all cells produce the same proteins
To prevent the production of unnecessary or harmful proteins
To increase the speed of protein synthesis
To allow cells to change their DNA sequence
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of proteins in gene regulation within human cells?
They destroy unnecessary DNA
They bind to gene regions to alter transcription rates
They convert DNA into RNA
They change the DNA sequence
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is an operon?
A type of RNA molecule
A method of gene regulation involving multiple genes
A sequence of DNA that codes for a single protein
A type of cell
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the function of a promoter in an operon?
To replicate DNA
To terminate transcription
To initiate transcription by binding RNA polymerase
To bind repressor proteins
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the Lac Operon, what happens when lactose is present?
No mRNA is produced
RNA polymerase is blocked
The repressor binds to the operator
The repressor changes shape and cannot bind to the operator
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of the repressor in the Lac Operon?
To convert lactose into glucose
To bind to the promoter and start transcription
To enhance RNA polymerase activity
To bind to the operator and block RNA polymerase
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it wasteful for bacteria to produce enzymes for lactose breakdown when lactose is absent?
The enzymes would cause mutations
The enzymes would not be needed and would consume resources
The enzymes would degrade other sugars
The enzymes would be inactive
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