MHT CET 202621 AprilEvening Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 21 April
- Shift
- Evening Shift
- Subject
- Biology
- Chapter
- Molecular Basis of Inheritance
MHT CET 2026 · 21 April · Evening Shift · Biology · Molecular Basis of Inheritance
In lactose operon of E. coli , what is the function of promoter?
In lactose operon of E. coli, what is the function of promoter?
Options
- ABinding of Gyrase enzyme
- BBinding of RNA polymerase
- CCodes for RNA polymerase
- DProcessing of mRNA
Correct answer
B. Binding of RNA polymerase
Step-by-step solution
In the lactose operon of E. coli, the promoter is a specific DNA sequence located upstream of the structural genes.
Its primary function is to provide a binding site for RNA polymerase, which is the enzyme responsible for initiating the transcription of the operon into mRNA.
Therefore, the promoter facilitates the binding of RNA polymerase.
Answer: Binding of RNA polymerase
Its primary function is to provide a binding site for RNA polymerase, which is the enzyme responsible for initiating the transcription of the operon into mRNA.
Therefore, the promoter facilitates the binding of RNA polymerase.
Answer: Binding of RNA polymerase