Answer
A. The replacement of the -OH of a carbonyl group with hydrogen.
Work Step by Step
B through D are all wrong since they involve elements other than C, H, and O, (B. S, C. P, D. N) which are not involved in carbonyl or carboxyl groups.
Campbell Biology (11th Edition)
by Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Published by
Pearson
ISBN 10:
0-13409-341-0
ISBN 13:
978-0-13409-341-3
Chapter 4 - Test Your Understanding - Level 2 - Application/Analysis - Page 65: 7
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