The Oxygen dissociation curve is

Parabola

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Slope

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Sigmoid

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Straight line

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Solution

The correct option is C Sigmoid
Oxygen dissociation curves show the relationship between oxygen levels (as partial pressure) and haemoglobin saturation. The oxygen dissociation curve for adult haemoglobin is sigmoidal (i.e. S-shaped) due to cooperative binding. So, the correct answer is (C).

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