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Fibrous and Globular Proteins :: Discussion

4.	Which of these type of curve shows the oxygen binding capacity of hemoglobin?
	A.	Hyperbolic curve
	B.	Sigmoidal curve
	C.	Exponential curve
	D.	Linear curve

	Answer: Option B


	Explanation:
	A single molecule of hemoglobin binds up to four molecules of oxygen (Hb+4O₂ = Hb(O₂)₄). The sigmoidal curve shows the cooperativity in binding of oxygen and hemoglobin. This curve is a plot between the fractional saturation of hemoglobin versus the partial pressure of oxygen.



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Published by:Michael Daani

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