In a particular bacterial cell, β-galactosidase is at high concentrations but $\beta$-galactoside permease is at very low concentrations.Which is the most likely explanation?
A) Both glucose and lactose are at high concentrations.
B) Both glucose and lactose are at low concentrations.
C) The operator has a mutation.
D) The promoter has a mutation.
E) One of the structural genes has a mutation.

Question

Quizplus · Accepted Answer

A mutation in one of the structural genes, specifically the gene encoding for β-galactoside permease, could lead to low concentrations of the permease while β-galactosidase is still produced at high levels.

In a Particular Bacterial Cell, β-Galactosidase Is at High Concentrations β\betaβ

In a Particular Bacterial Cell, β-Galactosidase Is at High Concentrations $\beta$