Haemoglobin is a Fe containing protein responsible for oxygen transport in the blood. The curves given below indicate the percentage saturation of haemoglobin by O 2 as a function of partial pressure of O 2 .
Which of the following statement/s is /are correct for the given curves?
I. In presence of CO 2 , higher 
is needed for a given percentage saturation.
II. In presence of CO 2 , lower 
is needed for a given percentage saturation.
III. The maximum percentage saturation is not affected by the presence of CO 2
IV. In the absence of CO 2 , maximum saturation of haemoglobin occurs at lower 
Text Solution
Verified by ExpertsB
According to given information graph I would be in presence of CO 2 and II would be in absence of CO 2 .
Now we can conclude from graph that
(i) In presence of CO 2 higher 
in needed for a given percentage saturation.
(iii) The maximum percentage saturation is not affected by presence of CO 2 .
(iv) In the absence of CO 2 , maximum saturation of haemoglobin occurs at lower 
.
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