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(D) In the $lac$ operon of $E. coli$, three structural genes are involved: $lacZ$, $lacY$, and $lacA$.$1$. $lacZ$ encodes $\beta$-galactosidase, which

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Permease

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(D) In the $lac$ operon of $E. coli$, three structural genes are involved: $lacZ$, $lacY$, and $lacA$.$1$. $lacZ$ encodes $\beta$-galactosidase, which hydrolyzes lactose into glucose and galactose.$2$. $lacY$ encodes Permease, which increases the permeability of the cell membrane to $\beta$-galactosides like lactose, allowing it to enter the cell.$3$. $lacA$ encodes Transacetylase, which transfers an acetyl group from acetyl-CoA to $\beta$-galactosides.Therefore, the enzyme responsible for increasing the permeability of the bacterial cell to lactose is Permease.

Which of the following enzymes increases the permeability of the bacterial cell to lactose?

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