Determine the outcome for the lac operon genotype shown below: Assume lactose is

Question

Determine the outcome for the lac operon genotype shown below: Assume lactose is present. Select one: O Functional beta-galactosidase and functional permease are produced. Only functional beta-galactosidase is produced. Functional permease is NOT produced. O Only functional permease is produced. Functional beta-galactosidase is NOT produced. Functional beta-galactosidase is NOT produced. Functional permease is NOT produced. Determine the outcome for the lac operon genotype shown below: Assume lactose is absent. Select one: O Functional beta-galactosidase and functional permease are produced. Only functional beta-galactosidase is produced. Functional permease is NOT produced. Only functional permease is produced. Functional beta-galactosidase is NOT produced. Functional beta-galactosidase is NOT produced. Functional permease is NOT produced.

Explanation / Answer

1) The correct answer is option D that is functional beta-galactosidase is not produced, functional permease is not produced because the Is mutation is dominant and the repressor is mutated such way that even if the lactose is present it can not get off from the operator and no expression would take place.

2) The correct answer is option C that is only functional permease is produced because gene of beta-galactosidase is not present or mutated. Even if the lactose is present the operator is mutated and constitutively lac Y is produced  

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