Microbial Regulatory Systems Flashcards
Listen up to slide 5
In the E. coli lac operon, ____ is used for food.
Lactose
How does lactose pass the plasma membrane to enter the cell?
Lactose permease allows entry, and PMF brings lactose inside the cell
Lactose must be converted to glucose to be ____.
catabolized
Operon
A group of coordinately expressed and regulated genes associated with a common purpose
What three lac operons are in E. coli
lac Z
lac Y
lac A
What type of molecules are involved in quorum sensing in Gram negative bacteria?
Homoserine lactones
What type of regulation does TrpR exhibit?
Negative repression
What type of expression of the lactose operon occurs in a Lac knock-out mutant?
On with glucose and on with lactose
A group of coordinately regulated structural genes is called what?
Operon
How many of the codons in the genetic table code for stop?
three
What secondary messenger molecule is formed by adenylate cyclase?
cAMP
What type of regulation does LacI exhibit?
Negative induction
The process that leads to a bacterium using up glucose before using any lactose (choosing its carbon source) is called what?
Catabolite repression
What regions of the Trp leader base-pair to form the anti-attenuator?
2 and 3
