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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.
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoFirst studies were done using E.coli, but this is the way some other enzymes work in other organisms. The lac operon allows for the effective digestion of lactose. It would be a waste of energy to produce these enzymes when there is no lactose available so it is supressed if there is enough glucose in the environment. The transcription of the lac operon requires both that lactose be present and that glucose not be present.
Wiki User
∙ 9y agoThe lac operon inducer in E.coli is called Allolactose. It is called an inducer since it can prompt or turn on the expression of the lac genes.
Wiki User
∙ 14y agoallolactose
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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.
How does e coli with limited food supply respond?
The lac operon is switched on so the E. coli can use it as a food source.
Is the lac operon found in prokaryotes or eukaryotes?
The lac operon is found in enteric bacteria, predominantly Escherichia coli, therefor it is found in prokaryotes.
The operon that controls the metabolism of lactose is called the what?
its an operon required for the transport and metabolism of lactose.
Why lac operon the gene expression is switch off?
explain the regulation of gene expression in lac operon.
Lactose in take in E. coli?
it is by lac operon syastem
The lac operon helps E. coli absorb?
t68u56r3
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.
How does e coli with limited food supply respond?
The lac operon is switched on so the E. coli can use it as a food source.
What is the lac operon in E. coli a classic example of?
gene expression occurring at transcription
Is the lac operon found in prokaryotes or eukaryotes?
The lac operon is found in enteric bacteria, predominantly Escherichia coli, therefor it is found in prokaryotes.
What happen to lac repressor in E. coli when lactose is present?
E. coli binds with lactose which changes its conformation so that it no longer binds to DNA. This allows the lactose operon to be transcribed.
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.
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 does tryptophan bind to when it is present in e. coli?
trp operon
What turns the lac operon on and off?
The lac operon is turned off and on by repressors.
