Chapter 10

Question 0

Sensor kinase

Answer 0

Binds to environmental signal
Activates itself via phosphorylation
In the membrane

Question 1

Two types of regulatory proteins

Answer 1

Repressors- bind to regulatory sequences in DNA to prevent transcriptions
activators- bind to regulatory sequences and stimulate transcription of target genes

Question 2

Response regulator

Answer 2

In cytoplasm
Takes phosphate from sensor
Binds to chromosome
Alters transcription rate for multiple genes

Question 3

Lac operon is ________

Answer 3

Repressable. On unless turned off

Question 4

Tryptophan operon

Answer 4

Inducible off unless turned on

Question 5

Holorepressor

Answer 5

Apoprepressor and corepressor together

Binds upstream and represses expression lf genes

Question 6

Attenuation

Answer 6

Regulatory mechanism in which translation of a leader peptide affects transcription downstream

Question 7

Euks differ from proks in regards to gene expression

Answer 7

Genes controlled individually (no real operons)
Introns
Different RNA polymerase a
Generalized and specialized transcription factors

Question 8

Small regulatory proteins

Answer 8

Regulate transcription or stability of mRNA

Either stabilize or degrade

Question 9

Chemo taxis

Answer 9

Bacteria swim towards good stuff and away from the bad

Question 10

Clockwise flagella rotation

Answer 10

Tumbling

Question 11

Methyl-accepting chemo taxis proteins (mcp)

Answer 11

Clustered at cell poles and bind to attractants

Initiate events lowering cheY- P levels

Question 12

What two things make up all of a cells mRNA molecules and proteins respectively

Answer 12

Transcriptomes and proteome

Question 13

2D gels view…?

Answer 13

Proteins