When precentrage saturation of haemoglobin with ` O_(2)` is plotted against `pO_(2)` , the curve obtained is

Assertion : A sigmoid curve is obtained when percentage saturation of haemoglobin with O_(2) is plotted against the PO_(2) . Reason : Every 100 mL of oxygenated blood can deliver around 5mL of O_(2) to the tissues under normal physiological conditions.

The curve obtained when percentage saturation of Hb with O_2 is plotted against pO_2 is

The curve obtained when percentage saturation of Hb with O_2 is plotted against pO_2 is

Combination of haemoglobin with O_(2) in lungs can be promoted by

When the total growth of a plant is plotted against time, the spape of the curve obtyained is:

Haemoblobin is a Fe containing protein responsible for oxygen transport in the blood. The curves given below indicate the percentage suturation of haemoglobin by O_(2) as a funcion 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 P_(O_(2)) is needed for a given percentage saturation. II. In presence of CO_(2) , lower P_(O_(2)) is needed for a give percentage saturation. III. The maximum percentgae saturation is not affected by the presence of CO_(2) IV. In the absence of CO_(2) , maximum saturation of haemoglobin occurs at lower p_(O_(2)) .

Haemoglobin is the O_(2) carrying pigment of