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The Lac Operon

View the animation below, then complete the quiz to test your knowledge of the concept.






1The lac repressor binds to what site within the lac operon?
A)lacZ
B)lacO
C)lacA
D)lacl
E)lacP



2Which of the following is not part of the lac operon?
A)lacO
B)lacZ
C)lacA
D)lacl
E)lacP



3The lac repressor is inactivated by binding to which of the following?
A)lactose
B)betagalactosidase
C)transcription factors
D)glucose
E)allolactose



4The polycistronic mRNA is transcribed from the lac operon when lactose is present in the cell.
A)True
B)False



5The lac repressor protein is active in the absence of lactose within the cell.
A)True
B)False







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