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← ScienceWhich outcome occurs when paramagnetic oxygen binds hemoglobin's iron?
A)Changes in protein quaternary structure✓
B)Unstable covalent bonds degrade porphyrin
C)Increased heme iron reduction to Fe+
D)Free radical formation from singlet oxygen
💡 Explanation
Oxygen binding to hemoglobin triggers cooperative binding through conformational changes caused by *orbital interactions*. The changes allow easier subsequent oxygen binding, therefore maximizing hemoglobin's oxygen carrying capacity rather than causing heme degradation.
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