Site MapHelpFeedbackThe Lac Operon (Induction)
The Lac Operon (Induction)

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






1When glucose is present
A)cyclic AMP is high, the catabolite activator protein (CAP) binds to the activator binding site, and transcription of lactose is turned on
B)cyclic AMP is low, CAP binds to the site activator binding site, and transcription of lactose is turned on
C)cyclic AMP is high, CAP does not bind to the activator binding site, and transcription of lactose is turned on
D)cyclic AMP is low, CAP does not bind to the activator binding site, and transcription is turned off



2The lac repressor
A)binds to the operator and prevents transcription
B)binds to the CAP site and prevents transcription
C)binds to the CAP site and facilitates transcription
D)binds to the operator and facilitates transcription



3When both glucose and lactose are present
A)cyclic AMP is high so transcription occurs
B)the lac repressor binds with the lactose and transcription occurs
C)RNA polymerase is able to bind to the operator so transcription occurs
D)transcription is turned off



4In the absence of glucose, when lactose is present it combines with the repressor, allowing RNA polymerase to carry on transcription.
A)True
B)False



5When both glucose and lactose are absent, transcription occurs.
A)True
B)False







Animation Quiz SiteOnline Learning Center

Home > Microbiology 1 > Chapter 8 > The Lac Operon (Induction)