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Question
The Lac Operon is turned on when allolactose molecules bind to
The Lac Operon is turned on when allolactose molecules bind to
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Solution
The correct option is D Repressor protein
When the glucose is present, the repressor molecule binds to the operator region of the Lac operon. When the glucose is absent and the lactose is present, the lactose is used as the source of energy by the organism. The lactose molecules are converted to allolactose which binds to the repressor molecule. This binding inhibits the binding to the operator region. The RNA polymerase reads the operon and the necessary enzymes are produced required for the metabolism of the lactose. Thus, the correct answer is option D.
When the glucose is present, the repressor molecule binds to the operator region of the Lac operon. When the glucose is absent and the lactose is present, the lactose is used as the source of energy by the organism. The lactose molecules are converted to allolactose which binds to the repressor molecule. This binding inhibits the binding to the operator region. The RNA polymerase reads the operon and the necessary enzymes are produced required for the metabolism of the lactose.
Thus, the correct answer is option D.
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