Answer
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.
Campbell Biology (12th Edition)
by Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Published by
Pearson
ISBN 10:
0135188741
ISBN 13:
978-0-13518-874-3
Chapter 5 - Test Your Understanding - Levels 1-2 - Remembering/Understanding - Page 91: 4
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
