Multiple Choice
How many oxygen molecules can one hemoglobin molecule carry?
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17. The Blood
Erythrocytes: Hemoglobin
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How many molecules of oxygen can one molecule of hemoglobin carry?
A
Eight
B
One
C
Four
D
Two
Verified step by step guidance1
Understand the structure of hemoglobin: Hemoglobin is a protein found in red blood cells, responsible for transporting oxygen from the lungs to the rest of the body.
Recognize the components of hemoglobin: Hemoglobin is composed of four subunits, each containing a heme group with an iron atom at its center.
Identify the role of the heme group: Each heme group can bind to one molecule of oxygen (O2) due to the presence of the iron atom, which can form a reversible bond with oxygen.
Calculate the total oxygen-carrying capacity: Since hemoglobin has four subunits, each with a heme group, it can bind to four molecules of oxygen in total.
Conclude the oxygen-carrying capacity: Therefore, one molecule of hemoglobin can carry four molecules of oxygen.
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