Biology - Molecular Basis of Inheritance Question with Solution | TestHub
BiologyMolecular Basis of InheritanceRegulation of Gene ExpressionEasy2 minPYQ_2026
BiologyEasysingle choice
In lac operon, which of the following acts as inducer and bind to repressor?
Options:
Answer:
B
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
Stream:MHT_CET_MEDICALSubject:BiologyTopic:Molecular Basis of InheritanceSubtopic:Regulation of Gene Expression
⏱ 2mℹ️ Source: PYQ_2026
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