Multiple Choice
In the context of hemoglobin cooperativity, what molecule binds directly to the iron atoms within the heme groups of a hemoglobin molecule?
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8. Protein Function
Hemoglobin Cooperativity
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Hemoglobin is a protein in your red blood cells that helps carry which of the following molecules?
A
Carbon dioxide (\(CO_2\))
B
Glucose
C
Nitrogen (\(N_2\))
D
Oxygen (\(O_2\))
Verified step by step guidance1
Understand the role of hemoglobin: Hemoglobin is a protein found in red blood cells that plays a critical role in transporting gases throughout the body.
Identify the molecule hemoglobin binds to: Hemoglobin has a high affinity for oxygen (\(O_2\)), which it binds to in the lungs and releases in tissues where oxygen is needed.
Clarify why hemoglobin does not bind to other molecules: Hemoglobin does not transport glucose, nitrogen (\(N_2\)), or carbon dioxide (\(CO_2\)) as its primary function. Carbon dioxide is primarily transported in the blood as bicarbonate ions (\(HCO_3^-\)), while glucose is transported by specific glucose transporters.
Explain the chemical interaction: Hemoglobin binds oxygen (\(O_2\)) through its iron-containing heme groups. Each hemoglobin molecule can bind up to four oxygen molecules, forming oxyhemoglobin.
Summarize the correct answer: The molecule hemoglobin helps carry is oxygen (\(O_2\)), which is essential for cellular respiration and energy production in the body.
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