Biology - Molecular Basis of Inheritance Question with Solution | TestHub
BiologyMolecular Basis of InheritanceRegulation of Gene ExpressionEasy2 minPYQ_2026
BiologyEasysingle choice
The repressor protein in lac operon is produced by the action of ________.
Options:
Answer:
B
Solution:
The lac operon consists of regulatory and structural genes.
The regulator gene (i gene) codes for the repressor protein of the lac operon. This repressor protein binds to the operator region and prevents RNA polymerase from transcribing the structural genes.
The operator gene is the site where the repressor binds.
The promoter gene is the site where RNA polymerase binds to initiate transcription.
The structural genes (z, y, and a) code for enzymes required for lactose metabolism.
Answer: regulator gene
Stream:MHT_CET_MEDICALSubject:BiologyTopic:Molecular Basis of InheritanceSubtopic:Regulation of Gene Expression
⏱ 2mℹ️ Source: PYQ_2026
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