Ch 8 - Gene Expression

Question 1

what do the two main levels of gene regulation do?

Answer 1

1) control activity of pre-existing ezymes
2) control the amt of enzyme

Question 2

_____ _______are frequently binding sites for regulatory proteins

Answer 2

Inverted repeats

Question 3

when a binding protein blocks transcription

Answer 3

negative regulation

Question 4

binding protein that can activate transciption

Answer 4

positive regulation

Question 5

preventing the synthesis of an enzyme in response to a signal

Answer 5

repression

Question 6

production of an enzyme in response to a signal

Answer 6

induction

Question 7

regulator protein activates the binding of RNA polymerase to DNA

Answer 7

positive control

Question 8

Multiple operons controlled by the same regulatory protein are called _______

Answer 8

regulons

Question 9

detects environmental signal and autophosphorylates

Answer 9

sensor kinase

Question 10

DNA-binding protein that regulates transcription

Answer 10

response regulator

Question 11

mechanism by which bacteria assess their population density

Answer 11

quorum sensing

Question 12

these bind to specific activator protein in a cell and trigger transcription of specific genes

Answer 12

autoinducer molecules

Question 13

these organisms produce bioluminescence

Answer 13

Vibrio fischeri

Question 14

global control mechanism triggered by amino acid starvation

Answer 14

stringent response

Question 15

signal amino acid starvation

Answer 15

alarmones

Question 16

counteract damage of denatured proteins and help cell recover from temperature stress

Answer 16

heat shock proteins

Question 17

Initiation of sporulation in Bacillus
is controlled by

Answer 17

phosphorelay

Question 18

these regulator cells have a dispersal role

Answer 18

swarmer cells

Question 19

these regulator cells have a reproductive role

Answer 19

stalked cells

Question 20

regulatory RNA that binds to RNA and blocks transcription

Answer 20

antisense RNA

Question 21

RNA domains in an mRNA molecule that can bind small molecules to control translation of mRNA

Answer 21

riboswitches