Biology 12th Edition

Published by McGraw-Hill Education
ISBN 10: 0078024269
ISBN 13: 978-0-07802-426-9

Chapter 13 - Regulation of Gene Expression - Engage - Thinking Scientifically - Page 243: 3

Answer

Inducible operons are activated in response to a molecule undergoing metabolism that regulates the operon, such as when the lac operon is induced when lactose is present. Repressible operons are deactivated in the presence of a regulatory molecule, like when the try operon is repressed when tryptophan is present.

Work Step by Step

Inducible operons are activated in response to a molecule undergoing metabolism that regulates the operon, such as when the lac operon is induced when lactose is present. Repressible operons are deactivated in the presence of a regulatory molecule, like when the try operon is repressed when tryptophan is present.
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