Podcast
Questions and Answers
What is the main function of the lac operon in E. coli and other enteric bacteria?
What is the main function of the lac operon in E. coli and other enteric bacteria?
- Transport and metabolism of lactose (correct)
- Synthesis of nuclear membrane
- Transport and metabolism of glucose
- Gene regulation of DNA replication
What is the role of beta-galactosidase in the lac operon?
What is the role of beta-galactosidase in the lac operon?
- Synthesis of nuclear membrane
- Digestion of lactose (correct)
- Digestion of glucose
- Preventing gene regulation
Why is the lac operon often discussed in introductory molecular and cellular biology classes?
Why is the lac operon often discussed in introductory molecular and cellular biology classes?
- Due to its role in protein synthesis
- Due to its role in glucose metabolism
- Due to its role in DNA replication
- Due to its role in gene regulation (correct)
What did François Jacob and Jacques Monod use the lactose metabolism system for?
What did François Jacob and Jacques Monod use the lactose metabolism system for?
At what level does gene regulation by lac operon occur in bacterial cells including E. coli?
At what level does gene regulation by lac operon occur in bacterial cells including E. coli?
What type of transcripts are bacterial operons like the lac operon able to produce?
What type of transcripts are bacterial operons like the lac operon able to produce?
What is the function of the gene product of lacZ?
What is the function of the gene product of lacZ?
What is the function of the gene product of lacY?
What is the function of the gene product of lacY?
What is the function of the gene product of lacA?
What is the function of the gene product of lacA?
What is the role of lacI in the absence of lactose?
What is the role of lacI in the absence of lactose?
What happens when lactose is available but not glucose?
What happens when lactose is available but not glucose?
What effect does the presence of glucose have on the lac operon?
What effect does the presence of glucose have on the lac operon?
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