Campbell Biology (11th Edition)

Published by Pearson
ISBN 10: 0-13409-341-0
ISBN 13: 978-0-13409-341-3

Chapter 41 - 41.1 - Concept Check - Page 900: 2


Some of these can be synthesized in the body.

Work Step by Step

Amino acids are considered "essential" when they cannot be synthesized in the body and must be obtained from external sources.
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