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How does the active CAP induce expression of the genes of the lactose operon?
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∙ 12y ago
It stimulates the binding of RNA polymerase to the promoter.
Wiki User
∙ 12y ago
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How does active CAP induce expression of the genes of the lactose operon?
It stimulates the binding of RNA polymerase to the promoter.
Where on the lac operon does transcription take place?
The lac operon encodes enzymes required in the digestion and transport of lactose. Transcription is activated when there is lactose in the cellular environment, and RNA polymerase binds to the promoter region of the operon, and activates the expression of lacA, lacZ and lacY.
The expression of the tryptophan operon is controlled by?
a repressor that is active when it binds to tryptophan
The operon that controls the metabolism of lactose is called the what?
its an operon required for the transport and metabolism of lactose.
The positive control of the lactose operon in bacteria is what?
Catabolite repression is the positive control of the lactose operon in bacteria. Glucose is metabolized initially and when depleted, the lactose.
How does active CAP induce expression of the genes of the lactose operon?
It stimulates the binding of RNA polymerase to the promoter.
When does the induction of the lac operon occur?
The lac operon is most active when glucose levels are low and lactose is present.
When is lac operon most active?
The lac operon is most active when glucose levels are low and lactose is present.
Where on the lac operon does transcription take place?
The lac operon encodes enzymes required in the digestion and transport of lactose. Transcription is activated when there is lactose in the cellular environment, and RNA polymerase binds to the promoter region of the operon, and activates the expression of lacA, lacZ and lacY.
The expression of the tryptophan operon is controlled by?
a repressor that is active when it binds to tryptophan
The operon that controls the metabolism of lactose is called the what?
its an operon required for the transport and metabolism 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 positive control of the lactose operon in bacteria is what?
Catabolite repression is the positive control of the lactose operon in bacteria. Glucose is metabolized initially and when depleted, the lactose.
The obvious advantage of the lactose operon system is that?
lactose metabolizing enzymes need not be made when lactose is not present.
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.
Why lac operon the gene expression is switch off?
explain the regulation of gene expression in lac operon.
