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5.Molecular Basis of Inheritance
medium
What effect would you expect if gene expression of the lac operon were completely repressed?
A
The cell would be more efficient without 'wasting' the energy required for the low level of Lac Z, LacY, and Lac A gene expression.
B
Allolactose would accumulate within the cell and become toxic.
C
Lactose would not be converted into the inducer and the operon could not be induced.
D
All of the above
Solution
A low level of Lac Z expression is required for conversion of lactose to the inducer, allolactose.
Standard 12
Biology
