Q1. Hemoglobin is 50 percent saturated with oxygen when pO2 = 26 torr (i.e. P50 = 26 torr ). If hemoglobin exhibited hyperbolic binding (as myoglobin does) with 50 percent saturation at 26 torr, what will be the fractional saturation () when pO2 = 30 torr and 100 torr? What does this tell you about the physiological importance of hemoglobin’s sigmoidal oxygenbinding curve?

Q2. Five dialysis bags, constructed from a semi-permeable membrane that is impermeable to sucrose, were filled with a variety of concentrations of sucrose and then placed in separate beakers containing an initial concentration of 0.6 M sucrose solution. At 10-minute intervals, the bags were massed (weighed. and percent change in mass of each bag was graphed. Which line represents the bag with the maximum initial concentration of sucrose?