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Molecular Biology and Biotechnology- ICAR JRF/SRF 2024 (Q.57)
MCQ (Single Correct)
Repressor molecules bind to
- Operon Model Regulation (Jacob and Monod): In prokaryotic operons (such as the lac operon and trp operon), repressor proteins bind with high sequence-specificity to the Operator region of DNA.
- Mechanism of Repression: The operator is located immediately adjacent to or overlapping the promoter. When the repressor is bound, RNA polymerase is sterically hindered from binding to the promoter and initiating transcription of downstream structural genes.
Correct option: (1) Operator
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