A normal E.coli cell that is grown for several hours in the presence of glucose alone will show _______ levels of the protein $\beta$-galactoside permease.A normal E.coli cell grown for several hours in the presence of lactase alone will show _______ levels of the protein $\beta$-galactoside permease.
A) extremely low;high
B) extremely low;extremely low
C) high;extremely low
D) high;high
E) high;variable

Question

Quizplus · Accepted Answer

Explanation:In the presence of glucose, the lac operon is repressed, so the levels of the protein F1F1F1S1F1F1F10-galactoside permease will be extremely low. In the presence of lactase, the lac operon will be induced, so the levels of the protein F1F1F1S1F1F1F10-galactoside permease will be high.

A Normal E β\betaβ -Galactoside Permease β\betaβ -Galactoside Permease

A Normal E $\beta$ -Galactoside Permease $\beta$ -Galactoside Permease