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Campbell Biology: Chapter 18 Test Preparation


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11) Allolactose, an isomer of lactose, is formed in small amounts from lactose. An E. coli cell is presented for the first time with the sugar lactose (containing allolactose) as a potential food source. Which of the following occurs when the lactose enters the cell?
A) The repressor protein attaches to the regulator.
B) Allolactose binds to the repressor protein.
C) Allolactose binds to the regulator gene.
D) The repressor protein and allolactose bind to RNA polymerase.
E) RNA polymerase attaches to the regulator.

Answer: B

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Description

Practice Questions
Chapter 18 - Regulation of Gene Expression

Book

Campbell Biology

Chapter: 18

Grade levels

11th grade
12th grade
College: First year
College: Second year
College: Third year
College: Fourth year

Created

2 years agoby powell_h

Views

13921

Subjects

science, life sciences, biology

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