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Question

Left shift of oxyhaemoglobin curve is noticed under:

A
Normal temperature and pH
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B
Low temperature and high pH
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C
Low pH and high temperature
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D
Low pH and low temperature
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Solution

The correct option is A Low temperature and high pH
The factors on which the shift of the oxyhaemoglobin dissociation curve depends, can be represented in the table below:
Controlling factors Decrease Increase
pH Right shiftLeft shift
Temperature Left shiftRight shift
pCO2 Left shiftRight shift
2,3-DPG Left shiftRight shift
Thus, the correct answer is option B.
Image result for dissociation curve

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