Multiple Choice
Which protein is primarily responsible for carrying oxygen in erythrocytes?
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17. The Blood
Erythrocytes: Hemoglobin
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How many oxygen molecules can one hemoglobin molecule carry?
A
One
B
Two
C
Four
D
Eight
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. It is composed of four subunits, each containing a heme group.
Learn about the heme group: Each heme group contains an iron atom that can bind to one oxygen molecule. Therefore, each subunit of hemoglobin can carry one oxygen molecule.
Calculate the total oxygen-carrying capacity: Since hemoglobin has four subunits, and each subunit can bind one oxygen molecule, multiply the number of subunits by the number of oxygen molecules each can carry.
Use the formula: The total number of oxygen molecules a hemoglobin molecule can carry is given by the equation: , where 4 is the number of subunits and 1 is the number of oxygen molecules each subunit can carry.
Conclude the calculation: Based on the structure and binding capacity of hemoglobin, determine the total number of oxygen molecules it can carry.
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