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What state is the repressor protein in when tryptophan is absent?
When tryptophan is absent, the repressor protein is in an inactive state, allowing transcription of the trp operon to continue. This is because the repressor protein needs tryptophan to bind to it, enabling it to attach to the operator region and block transcription of the operon.
In E. coli the tryprophan switches off the trp operon by?
binding to the trp repressor, causing a conformational change that allows it to bind to the operator region of the trp operon. This blocks RNA polymerase from transcribing the genes, turning off expression of the trp operon.
What does tryptophan bind to when it is present in E.coil?
In E. coli, tryptophan binds to the Trp repressor protein. This binding activates the repressor, allowing it to attach to the operator region of the trp operon, thereby inhibiting the transcription of genes involved in tryptophan biosynthesis. This regulation helps the bacteria maintain homeostasis by preventing the production of tryptophan when levels are sufficient.
What happens to the repressor protein when it's not functioning?
When the repressor protein in not functioning then the gene that that protein was blocking will be "turned on". BTW its not right to cheat, even on study guides ;)
Which aspect of lac operon regulation is an example of post-translational control?
The addition of a lactose molecule to the Lac repressor protein is an example of post-translational control in lac operon regulation. This modification prevents the Lac repressor from binding to the operator region, allowing for the transcription of the genes involved in lactose metabolism.
What state is the repressor protein in when tryptophan is absent?
When tryptophan is absent, the repressor protein is in an inactive state, allowing transcription of the trp operon to continue. This is because the repressor protein needs tryptophan to bind to it, enabling it to attach to the operator region and block transcription of the operon.
Why is the tryptophan operon turned off in the presence of tryptophan?
The tryptophan operon is turned off in the presence of tryptophan because tryptophan acts as a corepressor. When tryptophan levels are high, it binds to the trp repressor protein. This trp-repressor complex then binds to the operator region of the operon, preventing RNA polymerase from transcribing the genes involved in tryptophan synthesis.
In E. coli the tryprophan switches off the trp operon by?
binding to the trp repressor, causing a conformational change that allows it to bind to the operator region of the trp operon. This blocks RNA polymerase from transcribing the genes, turning off expression of the trp operon.
What does tryptophan bind to when it is present in E.coil?
In E. coli, tryptophan binds to the Trp repressor protein. This binding activates the repressor, allowing it to attach to the operator region of the trp operon, thereby inhibiting the transcription of genes involved in tryptophan biosynthesis. This regulation helps the bacteria maintain homeostasis by preventing the production of tryptophan when levels are sufficient.
This protein is produced by a regulatory gene?
a repressor protein
A repressor protein binds with?
The regulator
What happens to the repressor protein when it's not functioning?
When the repressor protein in not functioning then the gene that that protein was blocking will be "turned on". BTW its not right to cheat, even on study guides ;)
Which aspect of lac operon regulation is an example of post-translational control?
The addition of a lactose molecule to the Lac repressor protein is an example of post-translational control in lac operon regulation. This modification prevents the Lac repressor from binding to the operator region, allowing for the transcription of the genes involved in lactose metabolism.
The operon segment composed of the gene that codes for a protein repressor is called the?
The operon segment composed of the gene that codes for a protein repressor is called the regulatory gene. This gene produces the repressor protein that can bind to the operator region of the operon, preventing transcription of the structural genes when the repressor is bound.
What happens when the cell is not in the presence of tryptophan?
When the cell is not in the presence of tryptophan, it activates a regulatory protein called the trp repressor. This repressor binds to the DNA in the promoter region of the operon controlling tryptophan synthesis, preventing RNA polymerase from transcribing the genes. As a result, the production of enzymes involved in tryptophan synthesis is inhibited.
When is the repressor protein transcribed?
The repressor protein is transcribed when the gene coding for it is activated. This often occurs in response to specific signals or conditions in the cell. The repressor protein then acts to regulate the expression of other genes in the cell by binding to specific DNA sequences.
What is a repressible operon?
A repressible operon is a type of operon in bacteria where gene expression is usually active but can be turned off when a specific corepressor molecule binds to the repressor protein. This binding causes the repressor to bind to the operator region of the operon, blocking transcription and thus shutting down gene expression. An example of a repressible operon is the trp operon in E. coli, which is involved in tryptophan biosynthesis.
