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The presence of a repressor protein prevents the action of what enzyme?
The presence of a repressor protein prevents the action of RNA polymerase, which is responsible for transcribing DNA into RNA. By binding to specific regions on DNA, the repressor protein inhibits RNA polymerase from accessing the gene and initiating transcription.
How is the trp repressor protein and allosteric protein?
If Tryptophan is low in the diet, the repressor changes shape and allows the RNA polymerase to attach and copy the DNA so that Tryptophan can be produced by the cell.
What is the protein that binds DNA into tight coils?
histone
What is the relationship between a regulator gene and repressor protein?
A regulator gene encodes for a repressor protein, which can bind to specific DNA sequences to inhibit the expression of target genes. The repressor protein acts as a transcription factor by preventing RNA polymerase from binding to the promoter region of the target gene, thereby regulating its expression.
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.
A protein that binds to an operator and inhibits transcription?
A repressor protein binds to the operator region of DNA to inhibit the binding of RNA polymerase, blocking transcription of the gene. This mechanism is common in prokaryotic organisms to regulate gene expression by preventing transcription of specific genes when they are not needed.
What is the role of the lac operator in gene regulation?
The lac operator is a DNA sequence that acts as a binding site for a repressor protein in gene regulation. When the repressor protein binds to the lac operator, it prevents the expression of genes involved in lactose metabolism. This helps regulate the production of enzymes needed for lactose utilization in bacteria.
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?
The lac genes in E. coli are regulated by the lac operon, which is controlled by a repressor protein. The repressor binds to the operator region of the DNA, blocking the transcription of the lac genes. When lactose is present, it binds to the repressor, causing a conformational change that releases the repressor from the operator, allowing for the expression of the lac genes.
What gene specifies a protein that binds to an operatr and physically blocks rna polymerase from binding to a promoter site?
The gene that specifies a protein known as a repressor can bind to the operator region in the DNA, physically blocking RNA polymerase from binding to the promoter site. This mechanism helps regulate gene expression by preventing transcription of the gene.
The presence of a repressor protein prevents the action of what enzyme?
The presence of a repressor protein prevents the action of RNA polymerase, which is responsible for transcribing DNA into RNA. By binding to specific regions on DNA, the repressor protein inhibits RNA polymerase from accessing the gene and initiating transcription.
How do repressors affect promoters?
a repressor is a protein that binds to DNA, which turns off the genes that code for the digestive enzymes. the promoter, located near the digestive enzyme genes, is a section on DNA that serves as the binding site for the enzyme RNA polymers.
What are represor proteins?
Repressor is protein that can regulate gene expression. When it binds to the operator, the gene expression tuned off and when it detaches from the DNA the gene expresses as normal. This phenomeno of gene regulation is known as operons.
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.
How is the trp repressor protein and allosteric protein?
If Tryptophan is low in the diet, the repressor changes shape and allows the RNA polymerase to attach and copy the DNA so that Tryptophan can be produced by the cell.
What is the action of a DNA binding protein?
dna binding protein binds the 2 anti parallel strands of dna together
What is the protein that binds DNA into tight coils?
histone
