Human Biology, 14 Edition

Published by McGraw-Hill Education
ISBN 10: 1-25924-574-8
ISBN 13: 978-1-25924-574-9

Chapter 10 - Assess - Page 215: 12

Answer

12. a. Combines with oxygen (O2)

Work Step by Step

Hemoglobin comprises four polypeptide chains; each chain has a heme group which contains an iron ion. Oxygen binds to the iron and this is how --by combining with hemoglobin-- that oxygen is transported in the blood.
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