Question:

Which one of the following is not a part of lac operon?

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The lac operon serves as an inducible system, typically inactive but can be activated when an inducer like lactose is present.
  • Promoter
  • Regulator
  • Inducer
  • Operator
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The Correct Option is C

Solution and Explanation

The lac operon is composed of structural genes, a promoter, an operator, and a regulatory gene. It is activated when a molecule such as allolactose binds to and inactivates the repressor, thereby facilitating gene expression. However, this inducer is not an integral structural component of the operon itself.
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