### lac Operon Induction MechanismThe diagram explains the induction mechanism of the lac operon in prokaryotic cells. The lac operon is a cluster of genes responsible for the transport and metabolism of lactose in Escherichia coli (E. coli) and other bacteria. Below are the detailed components of the diagram:#### Components:**A: Structural Genes (lacZ, lacY, lacA)**- **lacZ**: Encodes β-galactosidase, an enzyme that breaks down lactose into glucose and galactose.- **lacY**: Encodes lactose permease, a protein involved in the transport of lactose into the cell.- **lacA**: Encodes thiogalactoside transacetylase, an enzyme with a role in detoxification (exact function in lactose metabolism is less clear).**B: Allolactose**- A metabolite of lactose that acts as an inducer of the lac operon.- Binds to the lacI repressor and inactivates it, preventing the repressor from binding to the operator.**C: lacI**- Represents the repressor protein encoded by the lacI gene.- In the absence of allolactose, the repressor binds to the operator (D), inhibiting transcription of the structural genes.**D: Operator**- A DNA sequence to which the lacI repressor binds.- When the repressor is bound, it prevents RNA polymerase from transcribing the structural genes.**E: CAP (Catabolite Activator Protein)**- Activates transcription in the presence of cAMP.- Binds to the CAP site near the promoter and enhances the binding of RNA polymerase to the promoter, increasing transcription of the lac operon.#### Pathway of Induction:1. **Lactose Entry and Metabolism**: Lactose enters the cell and is converted into allolactose.2. **Allolactose Binding**: Allolactose binds to the lacI repressor, causing a conformational change that releases the repressor from the operator region (D).3. **Transcription Activation**: Without the repressor binding the operator, RNA polymerase can transcribe the structural genes (A), leading to the production of β-galactosidase, lactose permease, and thiogalactoside transacetylase.4. **CAP Function** ### Question: Lac Operon DNA Sequence Binding Site#### Refer to the *lac* operon image above to see the available choices. Which lettered item represents the DNA sequence where the repressor binds?**Options:**- O E- O A- O B- O C- O D*Note: The referenced lac operon image should depict various components labeled with different letters, indicating specific sequences or regions within the operon.*

Name: ### lac Operon Induction MechanismThe diagram explains the induction
Uploaded: 2024-03-20T06:42:41.000Z
Channel: Bartleby
Description: ### lac Operon Induction MechanismThe diagram explains the induction mechanism of the lac operon in prokaryotic cells. The lac operon is a cluster of genes responsible for the transport and metabolism of lactose in Escherichia coli (E. coli) and oth