1.1. Describe the role of haemoglobin within the human body.

1.2. The oxyhaemoglobin dissociation curves for adult haemoglobin (HbA) and foetal  haemoglobin (HbF) are shown in Figure 1 below. 

Figure 1

Explain the steep gradient seen in the curve seen for HbA in Figure 1.

1.3. State what can be concluded from Figure 1 about the difference between HbF and HbA

1.4. Haemoglobin is a quaternary protein that is broken down in the liver. Predict what haemoglobin will be broken down into and suggest one function of this breakdown product in the body.