Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 12, DNA - Assessment - 13.4 Gene Regulation and Expression - Understand Key Concepts/Think Critically - Page 388: 28

Answer

a.

Work Step by Step

By binding to the repressor, lactose binds to the repressor, causing the repressor to fall off the operator (O) region. RNA polymerase can now bind to the promoter region to begin the process of transcription of the operon genes.
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