Ch 8 - Gene Expression Flashcards
what do the two main levels of gene regulation do?
1) control activity of pre-existing ezymes
2) control the amt of enzyme
_____ _______are frequently binding sites for regulatory proteins
Inverted repeats
when a binding protein blocks transcription
negative regulation
binding protein that can activate transciption
positive regulation
preventing the synthesis of an enzyme in response to a signal
repression
production of an enzyme in response to a signal
induction
regulator protein activates the binding of RNA polymerase to DNA
positive control
Multiple operons controlled by the same regulatory protein are called _______
regulons
detects environmental signal and autophosphorylates
sensor kinase
DNA-binding protein that regulates transcription
response regulator
mechanism by which bacteria assess their population density
quorum sensing
these bind to specific activator protein in a cell and trigger transcription of specific genes
autoinducer molecules
these organisms produce bioluminescence
Vibrio fischeri
global control mechanism triggered by amino acid starvation
stringent response
signal amino acid starvation
alarmones
counteract damage of denatured proteins and help cell recover from temperature stress
heat shock proteins
Initiation of sporulation in Bacillus
is controlled by
phosphorelay
these regulator cells have a dispersal role
swarmer cells
these regulator cells have a reproductive role
stalked cells
regulatory RNA that binds to RNA and blocks transcription
antisense RNA
RNA domains in an mRNA molecule that can bind small molecules to control translation of mRNA
riboswitches
