Biology 12th Edition

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

Chapter 6 - Metabolism: Energy and Enzymes - Engage - Thinking Scientifically: 3

Answer

Glucose breaks apart over time so it is important that it be converted to a more stable form for later use by the cell. Conversion of a less stable form into a more stable form (glycogen) requires an input of energy.

Work Step by Step

Ordered energy sources like glucose have a tendency towards entropy; they tend to break apart. Energy would be needed to put it back together. The analogy used in the book is that of a clean room. A clean room quickly becomes messy and energy is needed to clean it back up again.
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