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Model Paper 3 — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYModel Paper 31 Mark
MCQ
The structural gene in lac operon is switched off when-
  • A
    When repressor is bind to the operator
  • B
    When repressor is bind to the promoter
  • C
    When repressor is bind to the inducer
  • D
    When repressor is bind to the lactose
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