Lac Operon HB 24/25
Flashcard
•
Biology
•
11th - 12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the function of the inducer in the lac operon?
Back
The inducer binds to the repressor, causing it to change shape and release from the operator, allowing RNA polymerase to transcribe the genes necessary for lactose metabolism.
2.
FLASHCARD QUESTION
Front
What role does the repressor play in the lac operon?
Back
The repressor binds to the operator region of the lac operon, blocking RNA polymerase from transcribing the genes when lactose is not present.
3.
FLASHCARD QUESTION
Front
What is the operator in the context of the lac operon?
Back
The operator is a segment of DNA where the repressor binds, preventing transcription of the downstream genes.
4.
FLASHCARD QUESTION
Front
What is the promoter in the lac operon?
Back
The promoter is the region of DNA where RNA polymerase binds to initiate transcription of the lac operon genes.
5.
FLASHCARD QUESTION
Front
What happens when lactose is present in the environment of a bacterial cell?
Back
Lactose acts as an inducer, binding to the repressor and allowing transcription of the lac operon genes to occur.
6.
FLASHCARD QUESTION
Front
What is the significance of the lac operon in bacteria?
Back
The lac operon allows bacteria to efficiently utilize lactose as an energy source when glucose is not available.
7.
FLASHCARD QUESTION
Front
Define 'corepressor' in the context of gene regulation.
Back
A corepressor is a molecule that binds to a repressor protein, enhancing its ability to bind to the operator and inhibit transcription.
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