Biological Science (6th Edition)

Published by Benjamin Cummings
ISBN 10: 0321976495
ISBN 13: 978-0-32197-649-9

Chapter 3 - Protein Structure and Function - Review - Page 91: 1

Answer

d. an amino group and a carboxyl group

Work Step by Step

The central carbon in an amino acid is attached to an R group, a hydrogen atom, a carboxyl group, and an amino group. It cannot be the R group because it varies among amino acids. It cannot be the hydrogen atom because it is not a functional group.
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