What is the primary function of the lac operon?

Understanding the Lac Operon

Quiz
•
Biology
•
12th Grade
•
Easy
Nishigandha Devare
Used 1+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To regulate glucose metabolism in plants.
To enhance protein synthesis in eukaryotes.
To control DNA replication in bacteria.
To regulate lactose metabolism in bacteria.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Name the three structural genes of the lac operon.
lacP, lacQ, lacR
lacX, lacY, lacZ
lacB, lacC, lacD
lacZ, lacY, lacA
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What role does the lac repressor play in the lac operon?
The lac repressor binds to the promoter to enhance gene expression.
The lac repressor promotes transcription of the lac operon.
The lac repressor is involved in the synthesis of lactose.
The lac repressor inhibits transcription of the lac operon by binding to the operator.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does lactose affect the expression of the lac operon?
Lactose has no effect on the expression of the lac operon.
Lactose induces the expression of the lac operon by inactivating the repressor.
Lactose decreases the expression of the lac operon by binding to the promoter.
Lactose represses the expression of the lac operon by activating the repressor.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of the promoter region in the lac operon?
The promoter region is essential for RNA polymerase binding and transcription initiation in the lac operon.
The promoter region is where the repressor protein binds.
The promoter region prevents transcription in the lac operon.
The promoter region is responsible for protein synthesis in the lac operon.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Describe the function of the operator in the lac operon.
The operator enhances transcription by promoting RNA polymerase binding.
The operator acts as a structural component of the lac operon, providing stability.
The operator is responsible for the synthesis of lactose in the cell.
The operator regulates transcription by binding the repressor protein, controlling gene expression in response to lactose availability.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the effect of glucose on the lac operon expression?
Glucose has no effect on the lac operon expression.
Glucose enhances the expression of the lac operon.
Glucose represses the expression of the lac operon.
Glucose activates the lac operon under all conditions.
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