Why Is the Protein Hemoglobin Necessary for Successful Circulation of Oxygen

question 33

Multiple Choice

Why is the protein hemoglobin necessary for successful circulation of oxygen?

• A) Because oxygen won't dissolve in water (or blood) to transport it to demanding cells
• B) Because it carries carbon dioxide which bonds easily with oxygen
• C) It isn't really necessary because not all living things have hemoglobin.
• D) Because it bonds easily with oxygen so the blood can carry enough to supply demanding cells
• E) Because the hemoglobin supplies energy to demanding cells

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