A mutant strain of E. coli produces β-galactosidase in both the presence and the absence of lactose. Where in the operon might the mutation in this strain be located?
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The lac operon consists of three structural genes (lacZ, lacY, and lacA) and a promoter (P) and operator (O) region. Show more…
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A mutant strain of $E .$ coli produces $\beta$ -galactosidase in both the presence and the absence of lactose. Where in the operon might the mutation in this strain be located?
A mutant strain of $E .$ coli produces $\beta$ -galactosidase in both the presence and the absence of lactose. Where in the operon might the mutation in this strain occur?
A mutant E. coli strain is found that does not synthesize any enzymes in the presence or absence of lactose (or allolactose). What mutation(s) can lead to this outcome? The lac operon is shown here as a guide. zones where proteins bind DNA: genes and regulatory sequences lac I promoter operator lac Z lac Y lac A Lac repressor B-galactosidase B-galactoside-transacetylase permease promoter Lac A Lac Y Operator Lac Z lac I
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