Podcast
Questions and Answers
What is the role of a repressor protein in gene regulation?
What is the role of a repressor protein in gene regulation?
- It binds to the inducer and reduces its activity
- It binds to the RNA polymerase and enhances its activity
- It binds to the promoter and increases transcription
- It binds to the operator and prevents transcription (correct)
What type of pathways are usually characterized by the presence of a gene product inhibiting gene expression?
What type of pathways are usually characterized by the presence of a gene product inhibiting gene expression?
- Constitutive pathways
- Repressible pathways (correct)
- Inducible pathways
- Regulatory pathways
What is the function of an activator protein in gene regulation?
What is the function of an activator protein in gene regulation?
- It reduces the activity of an inducer molecule
- It inhibits the binding of RNA polymerase to the promoter
- It enhances the binding of RNA polymerase to the promoter (correct)
- It represses the transcription of a gene
What is the role of the end product tryptophan in the anabolic pathway that leads to its synthesis?
What is the role of the end product tryptophan in the anabolic pathway that leads to its synthesis?
What is the term used to describe genes that are switched on in response to an external stimulus?
What is the term used to describe genes that are switched on in response to an external stimulus?
What is the term for the molecule that binds to the repressor, enabling it to bind to DNA and cause repression of gene expression?
What is the term for the molecule that binds to the repressor, enabling it to bind to DNA and cause repression of gene expression?
What is the role of an inducer molecule in gene regulation?
What is the role of an inducer molecule in gene regulation?
What is the term used to describe the mechanism by which genes are turned off in response to an external stimulus?
What is the term used to describe the mechanism by which genes are turned off in response to an external stimulus?
In negative regulation, what is the default state of RNA production?
In negative regulation, what is the default state of RNA production?
What is the term used to describe the process of switching on and off gene expression in response to environmental changes?
What is the term used to describe the process of switching on and off gene expression in response to environmental changes?
What is the term for the regulator molecule that directly stimulates RNA production in positive regulation?
What is the term for the regulator molecule that directly stimulates RNA production in positive regulation?
What is the purpose of the inhibitor in gene regulation?
What is the purpose of the inhibitor in gene regulation?
What is the role of a small effector molecule in genetic regulatory proteins?
What is the role of a small effector molecule in genetic regulatory proteins?
What type of enzymes are produced in response to the presence of lactose in E. coli?
What type of enzymes are produced in response to the presence of lactose in E. coli?
What is the role of regulatory proteins in gene expression?
What is the role of regulatory proteins in gene expression?
What is the term for the process by which the production of an enzyme is increased in response to the presence of its substrate?
What is the term for the process by which the production of an enzyme is increased in response to the presence of its substrate?
Who proposed the operon model for the regulation of gene expression in E. coli?
Who proposed the operon model for the regulation of gene expression in E. coli?
What is the term for the enzymes that are present in negligible amounts in the absence of their substrate?
What is the term for the enzymes that are present in negligible amounts in the absence of their substrate?
