Which phenotype would be observed in an E.coli cell with the lacY-genotype?
A)Cells would not be able to accumulate lactose due to the absence of the lactose permease membrane protein.
B)Cells would not be able to accumulate lactose due to the presence of a defect in the β-galactosidase gene.
C)Cells are unable to cleave an indicator molecule even if lactose is available as an inducer.
D)Cells are able to cleave an indicator molecule even if lactose is absent as an inducer.

Question

Quizplus · Accepted Answer

The lacY gene codes for the lactose permease membrane protein, which is responsible for importing lactose into the cell. Therefore, in an E.coli cell with the lacY-genotype, cells would not be able to accumulate lactose due to the absence of the lactose permease membrane protein.

Which Phenotype Would Be Observed in an E