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The cooperative binding of O2 in hemoglobin is due to
- a)a decrease in size of iron followed by changes in the protein conformation
- b)an increase in size of iron followed by changes in the protein conformation
- c)a decrease in size of iron that is NOT accompanied by the protein conformational changes
- d)an increase in size of iron that is NOT accompanied by the protein conformational changes
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
The cooperative binding of O2in hemoglobin is due toa)a decrease in si...
- Upon oxygenation, the transfer of an electron occurs from a Fe+2 ion to the antibonding π* orbital of O2. The oxygen which picks up the electron becomes a superoxide (O-2) ion. The electronic configuration of Fe+3 ion is low spin t2g5.
- The cooperative binding of O2 in hemoglobin is due to a decrease in size of iron (FeII to FeIII). Fe3+ moves into the plane of the porphyrin ring followed by changes in the protein conformation.
Hence, option 1 is the correct answer.
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The cooperative binding of O2in hemoglobin is due toa)a decrease in si...
Cooperative Binding of O2 in Hemoglobin:
The cooperative binding of O2 in hemoglobin is a crucial process that allows hemoglobin to efficiently transport oxygen throughout the body. This process is primarily due to a decrease in the size of iron followed by changes in the protein conformation.
Decrease in Size of Iron:
- When oxygen binds to hemoglobin, it interacts with the iron atom at the center of the heme group.
- This interaction causes the iron atom to undergo a conformational change, decreasing in size.
- The decrease in size of the iron atom allows for tighter binding of oxygen molecules.
Changes in Protein Conformation:
- The binding of oxygen to hemoglobin triggers a series of conformational changes in the protein structure.
- These changes in protein conformation help stabilize the binding of oxygen molecules to hemoglobin.
- As more oxygen molecules bind to hemoglobin, the protein undergoes further conformational changes, leading to increased oxygen affinity.
Overall Process:
- The cooperative binding of O2 in hemoglobin is a dynamic process that involves both changes in the size of iron and protein conformation.
- This process ensures efficient oxygen transport in the body, allowing hemoglobin to release oxygen to tissues in need.
- Understanding the cooperative binding of O2 in hemoglobin is essential for comprehending oxygen transport and the functioning of the respiratory system.
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The cooperative binding of O2in hemoglobin is due toa)a decrease in size of iron followed by changes in the protein conformationb)an increase in size of iron followed by changes in the protein conformationc)a decrease in size of iron that is NOT accompanied by the protein conformational changesd)an increase in size of iron that is NOT accompanied by the protein conformational changesCorrect answer is option 'A'. Can you explain this answer?
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The cooperative binding of O2in hemoglobin is due toa)a decrease in size of iron followed by changes in the protein conformationb)an increase in size of iron followed by changes in the protein conformationc)a decrease in size of iron that is NOT accompanied by the protein conformational changesd)an increase in size of iron that is NOT accompanied by the protein conformational changesCorrect answer is option 'A'. Can you explain this answer? for UGC NET 2024 is part of UGC NET preparation. The Question and answers have been prepared according to the UGC NET exam syllabus. Information about The cooperative binding of O2in hemoglobin is due toa)a decrease in size of iron followed by changes in the protein conformationb)an increase in size of iron followed by changes in the protein conformationc)a decrease in size of iron that is NOT accompanied by the protein conformational changesd)an increase in size of iron that is NOT accompanied by the protein conformational changesCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for UGC NET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The cooperative binding of O2in hemoglobin is due toa)a decrease in size of iron followed by changes in the protein conformationb)an increase in size of iron followed by changes in the protein conformationc)a decrease in size of iron that is NOT accompanied by the protein conformational changesd)an increase in size of iron that is NOT accompanied by the protein conformational changesCorrect answer is option 'A'. Can you explain this answer?.
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