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Question: Answered & Verified by Expert
Lactose is the substrate for the enzyme beta galactosidase and it regulates switching on and off of the operon. Hence it is termed as
BiologyMolecular Basis of InheritanceNEET
Options:
  • A Inducer
  • B Repressor
  • C Aporepressor
  • D Co-repressor
Solution:
2682 Upvotes Verified Answer
The correct answer is: Inducer
In lac operon, the regulator gene produces active repressor protein which binds to the operator switching it off. When bacteria are grown in a medium having lactose, it functions as an inducer and binds repressor making it inactive and switching on the system.

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