Podcast
Questions and Answers
What is the main function of an operon in bacteria?
What is the main function of an operon in bacteria?
- Code for transport proteins
- Code for structural genes
- Code for enzymes in a related metabolic pathway (correct)
- Code for regulatory proteins
Where is the operator located in relation to the promoter and structural genes in an operon?
Where is the operator located in relation to the promoter and structural genes in an operon?
- Upstream of the promoter
- At the end of the operon
- Between the promoter and structural gene (correct)
- Downstream of the promoter
What binds to the operator to inhibit transcription of structural genes in an operon?
What binds to the operator to inhibit transcription of structural genes in an operon?
- RNA polymerase
- mRNA
- Active repressor protein (correct)
- Ribosomes
Which of the following is NOT an advantage of the operon model?
Which of the following is NOT an advantage of the operon model?
Where are regulatory genes, which code for regulatory proteins, typically located in relation to an operon?
Where are regulatory genes, which code for regulatory proteins, typically located in relation to an operon?
Which type of operon system allows transcription to occur only when an inducer is present?
Which type of operon system allows transcription to occur only when an inducer is present?
What is the main characteristic of an inducible operon?
What is the main characteristic of an inducible operon?
Which of the following represents a distinguishing feature of the Trp operon?
Which of the following represents a distinguishing feature of the Trp operon?
In a repressible operon, what happens when the co-repressor binds to the repressor?
In a repressible operon, what happens when the co-repressor binds to the repressor?
Which type of metabolic pathway is associated with an inducible operon?
Which type of metabolic pathway is associated with an inducible operon?
What role does the inducer play in an inducible operon?
What role does the inducer play in an inducible operon?
What happens when the repressor cannot bind to the operator in a repressible system?
What happens when the repressor cannot bind to the operator in a repressible system?
What is the function of an inducer in a bacterial operon system?
What is the function of an inducer in a bacterial operon system?
Which type of gene is responsible for encoding products required in basic cellular processes and is expressed all the time?
Which type of gene is responsible for encoding products required in basic cellular processes and is expressed all the time?
In a repressible system, what role does a corepressor play?
In a repressible system, what role does a corepressor play?
What is the function of polycistronic mRNA in gene expression?
What is the function of polycistronic mRNA in gene expression?
What does an operator site on DNA do in relation to gene expression?
What does an operator site on DNA do in relation to gene expression?
Which type of gene codes for proteins involved in regulating the expression of other genes?
Which type of gene codes for proteins involved in regulating the expression of other genes?
