When temperature decreases the oxyhaemoglobin curve will become

More steep

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Straight

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Parabola

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All of the above

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Solution

The correct option is A More steep
The $O_{2}$ dissociation curve is obtained by plotting percentage saturation of Hb with $O_{2}$ against $p O_{2}$ . At decreased temperature and rise in pH, the oxygen haemoglobin curve becomes steeper as the curve shifts to the left. This indicates that at these conditions, the Hb has a higher affinity for oxygen.

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When temperature decreases Oxy-Hb curve becomes

P_{50}

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