Podcast
Questions and Answers
What is the main reason why gene expression regulation is necessary in cells?
What is the main reason why gene expression regulation is necessary in cells?
- Cells have the same proteins
- Cells have different promoters
- Cells have all the DNA but not all genes are expressed (correct)
- Cells have different types of DNA
What is the function of repressor proteins in gene expression regulation?
What is the function of repressor proteins in gene expression regulation?
- To degrade mRNA transcripts
- To enhance the interaction of RNA polymerase and a promoter
- To bind to the DNA to stop RNA polymerase from proceeding (correct)
- To transcribe genes more efficiently
What is the lac operon an example of in prokaryotic cells?
What is the lac operon an example of in prokaryotic cells?
- Gene silencing
- Gene expression regulation (correct)
- Gene duplication
- Gene mutation
What is the function of an operator in an operon?
What is the function of an operator in an operon?
What type of protein regulates gene expression by binding to non-coding sequences on DNA?
What type of protein regulates gene expression by binding to non-coding sequences on DNA?
What is the lac operon composed of?
What is the lac operon composed of?
What is the primary reason why the lac operon is necessary in E. coli?
What is the primary reason why the lac operon is necessary in E. coli?
What is the role of the repressor protein in the lac operon?
What is the role of the repressor protein in the lac operon?
What type of gene is the regulatory gene that codes for the repressor protein in the lac operon?
What type of gene is the regulatory gene that codes for the repressor protein in the lac operon?
What happens to the repressor protein when lactose is present in the bacterial cell?
What happens to the repressor protein when lactose is present in the bacterial cell?
What is the role of the lac operon in protein synthesis?
What is the role of the lac operon in protein synthesis?
What is the characteristic of a stem cell?
What is the characteristic of a stem cell?
Flashcards are hidden until you start studying