Which statement about positive cooperativity of hemoglobin is true?
A) Binding by the first O2 molecule means that a larger increase in PO2 is needed for hemoglobin to bind a second O2 molecule.
B) Positive cooperativity results from changes in the primary structure of hemoglobin.
C) Positive cooperativity applies for binding the fourth O2 molecule once a third O2 molecule is bound.
D) The linear relationship between PO2 and the amount of O2 bound to hemoglobin reflects positive cooperativity.
E) Binding by the second O2 molecule allows the third O2 molecule to bind more easily.
Correct Answer:
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Q194: Refer to the graph. Q195: At rest, the _ PO2 in blood Q196: Which feature characterizes myoglobin? Q197: Which event can occur when fetal and Q198: Which statement on perfusion or ventilation in Q200: What is the correct pairing of type Q201: Axons of respiratory motor neurons in the Q202: Which feature characterizes CO2? Q203: In red blood cells, _ reversibly converts Q204: The major site of PCO2 sensitivity is
A) It is present
A) PCO2 in blood
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