Biology 2010 Student Edition

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

Chapter 2, The Chemistry of Life - Design Your Own Lab - Pre-Lab - Temperature and Enzymes - Page 54: b


Enzyme activity can be affected by pH, temperature, and regulatory molecules.

Work Step by Step

Enzymes usually work best within a narrow range of temperatures and pH values. For example, human enzymes work best at about 37$^{\circ}$C. Some enzymes such as pepsin work best in acidic, low pH conditions such as those found in the stomach. Certain regulatory molecules can either activate or deactivate enzymes, depending on the needs of the cell.
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