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Which of the following is correct concerning the oxygenation plot of proteins X and Y shown below?

Which of the following is correct concerning the oxygenation plot of proteins X and Y shown below?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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**Oxygen Binding Plot Analysis** **Question:** Which of the following is correct concerning the oxygenation plot of proteins X and Y shown below? **Description of the Graph:** - **Title:** Oxygen binding plot - **Axes:** - X-axis: \( pO2 \) (torr) - Y-axis: Y (fraction saturation) - **Curves:** - Curve X (blue line with diamonds): Demonstrates a sigmoid shape, indicating cooperative binding. It starts at the origin and reaches saturation very quickly, leveling off near 1.0 as \( pO2 \) increases towards 100 torr. - Curve Y (pink line with circles): Shows a hyperbolic shape, indicating non-cooperative binding. It starts at the origin and gradually approaches saturation, reaching close to 1.0 at higher \( pO2 \) levels (around 100 torr). **Key Observations:** - **Protein X:** Exhibits a sigmoidal curve, suggesting cooperative binding behavior typically associated with hemoglobin-like proteins. - **Protein Y:** Exhibits a hyperbolic curve, suggesting non-cooperative binding similar to myoglobin or other simple binding proteins. These plots represent how each protein binds oxygen across different partial pressures, demonstrating their distinct physiological roles or affinities.
Transcribed Image Text:**Oxygen Binding Plot Analysis** **Question:** Which of the following is correct concerning the oxygenation plot of proteins X and Y shown below? **Description of the Graph:** - **Title:** Oxygen binding plot - **Axes:** - X-axis: \( pO2 \) (torr) - Y-axis: Y (fraction saturation) - **Curves:** - Curve X (blue line with diamonds): Demonstrates a sigmoid shape, indicating cooperative binding. It starts at the origin and reaches saturation very quickly, leveling off near 1.0 as \( pO2 \) increases towards 100 torr. - Curve Y (pink line with circles): Shows a hyperbolic shape, indicating non-cooperative binding. It starts at the origin and gradually approaches saturation, reaching close to 1.0 at higher \( pO2 \) levels (around 100 torr). **Key Observations:** - **Protein X:** Exhibits a sigmoidal curve, suggesting cooperative binding behavior typically associated with hemoglobin-like proteins. - **Protein Y:** Exhibits a hyperbolic curve, suggesting non-cooperative binding similar to myoglobin or other simple binding proteins. These plots represent how each protein binds oxygen across different partial pressures, demonstrating their distinct physiological roles or affinities.
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