Campbell Biology (11th Edition)

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

Chapter 5 - Test Your Understanding - Level 1 - Knowledge/Comprehension - Page 91: 4


A. Primary level.

Work Step by Step

A takes it structure from the covalent peptide bonds between successive amino acids, while B through D usually involve at least some hydrogen bonding to get their structure.
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