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Which enzyme/s will be produced in a cell in which there is a non-sense mutation in the lac Y gene?

  1. A
    -galactosidase
  2. B
    Lactose permease
  3. C
    Transacetylase
  4. D
    Lactose permease and transacetylase

Solution & Step-by-step Explanation

Getty Images Explore The lac operon consists of three structural genes: lacZ (codes for -galactosidase), lacY (codes for permease), and lacA (codes for transacetylase). A non-sense mutation in lacY causes premature termination of translation at that point. Since lacZ comes before lacY, it will be transcribed and translated normally, but lacY and lacA will not produce functional proteins.

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Which enzyme/s will be produced in a cell in which there is a non-sense mutation in the lac Y gene?
A
-galactosidase
B
Lactose permease
C
Transacetylase
D
Lactose permease and transacetylase

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Molecular BiologyLac Operon

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