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Ch. 16 questions

Microbiology

QuestionAnswer
When do bacteria normally regulate gene expression? during transcription
How is the lac operon induced? lactose combines with lac repressor to inactivate it--RNA polymerase can then bind to the promoter and transcribe the lac operon
How is the tryptophan operon repressed? tryptophan binds to trp operon aporepressor fo form active complex--binds to trp operator and prevents RNA polymerase binding and transcription
Describe feedback inhibition associated with repressible operons where end product of peron pathway makes a complex with aporepressor to inhibit transcription
Give 2 ways that inducible and repressible expression control differs inducible--turn on expression--repressible--turn expression off--repressible systems have fine control over how much expression occurs
What is a function of proteases? rid the cell of unwanted proteins
Created by: heatherlvn
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