MHT CET 202626 AprilMorning Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 26 April
- Shift
- Morning Shift
- Subject
- Biology
- Chapter
- Molecular Basis of Inheritance
MHT CET 2026 · 26 April · Morning Shift · Biology · Molecular Basis of Inheritance
In lac operon, which of the following acts as inducer and bind to...
In lac operon, which of the following acts as inducer and bind to repressor?
Options
- AGlucose
- BLactose
- CGalactose
- DSucrose
Correct answer
B. Lactose
Step-by-step solution
In the lac operon, lactose (specifically its isomer allolactose) acts as an inducer.
The inducer binds to the repressor protein, causing a conformational change that prevents the repressor from binding to the operator region.
This allows RNA polymerase to access the promoter and transcribe the structural genes.
Answer: Lactose
The inducer binds to the repressor protein, causing a conformational change that prevents the repressor from binding to the operator region.
This allows RNA polymerase to access the promoter and transcribe the structural genes.
Answer: Lactose