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How does lactose cause the lac operon to turn on?
The lac repressor protein has a binding site for lactose itself.
The operon that controls the metabolism of lactose is called the what?
its an operon required for the transport and metabolism of lactose.
What is lac operon in E. coli?
The lac operon is a place on the DNA that binds to the DNA to stop the production of the RNA sequence to code for lactase (breaks down lactose) or binds to lactase to let the production of the RNA sequence to proceed.
What regarding control of the lac operon and lactose utilization in bacteria is false?
Bacteria preferentially utilize lactose as a carbon source.
Under which conditions are the lac structural genes expressed most efficiently?
No glucose High lactose
How does lactose cause the lac operon to turn on?
The lac repressor protein has a binding site for lactose itself.
What causes the lac genes to turn on?
The pressence of lactose.
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
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.
When does the induction of the lac operon occur?
The lac operon is most active when glucose levels are low and lactose is present.
What environmental factor causes the lac operon to turn on?
In the lac operon model, lactose acts as in inducer molecule. In the presence of lactose, the molecule binds to the repressor protein. This repressor-lactose complex is unable to bind to the promoter. When the promoter is not occupied, RNA pol - II binds to it and begins transcribing the structural genes located downstream. Thus, the lac operon is turned on in the presence of lactose.
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.
The operon that controls the metabolism of lactose is called the what?
its an operon required for the transport and metabolism of lactose.
The lac operon enables a bacterium to build the proteins needed for lactose metabolism only when?
Lactose is present, otherwise the lac operon is not needed and is shut off.
Lactose in take in E. coli?
it is by lac operon syastem
The lac operon is shut off when what is absent?
Lactose is absent
