0
It allows lactose to permeate the cell membrane, and then break bonds with glucose and galactose to use the lactose for food.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
What causes the lac genes in E. coli to turn off?
A lac repressor turns off the lac genes by binding to the operator.
When the lac repressor protein binds to the?
The other region is the OPERATOR (O) e coli cells contains several copies of a DNA binding proteins known as the lac repressor, which can be bind to the O region your answer: Operator
What prevents e coli from expressing the lac genes in its DNA all of the time?
whenever the Lactose is present the lac genes in E.coli are turn on
A lac repressor turns ff the lac genes by binding to?
A lac repressor turns off the lac genes by binding to the operator
How many genes in the lac operon are found in e. coli?
My answer is 3, I am pretty sure I am right, but I would double check to make sure. I am in ninth grade taking biology at PineTree.
What does the E coli the lac operon controls?
When the lac operon controls the expression of proteins in the E.coli cell that can break down lactose into two sugars, glucose and galactose. When lactose is present, it binds to the repressor that typically sits on the lac operon, changing the repressor's conformation such that it can no longer bind to the lac operon. Because of this, RNA polymerase can now transcribe the gene into mRNA, which in turn is translated into the proteins that can break down lactose.
What does the E coli the lac operon control?
When the lac operon controls the expression of proteins in the E.coli cell that can break down lactose into two sugars, glucose and galactose. When lactose is present, it binds to the repressor that typically sits on the lac operon, changing the repressor's conformation such that it can no longer bind to the lac operon. Because of this, RNA polymerase can now transcribe the gene into mRNA, which in turn is translated into the proteins that can break down lactose.
What is an analogy that demonstrates how the lac repressor functions?
Think of the repressor as an on off switch for radio
When is gene expression blocked in the lac operon system?
The repressor protein blocks the genes from making mRNA.
What genes is not a part of the lac operon?
repressor gene
What does the lac operon lactose bind to?
lac Z, lac Y, and lac A. Enzymes for the degradation and preparation of lactose for bacterial metabolisms.
How does lactose cause the lac operon to turn on?
The lac repressor protein has a binding site for lactose itself.
