Biology 9700 · AS & A Level · Transport of oxygen and carbon dioxide
Transport of oxygen and carbon dioxide — practice question
Respiratory gases are carried by both blood plasma and red blood cells. The globular protein found in red blood cells is haemoglobin.
(a)[2]
Describe characteristics of a haemoglobin molecule that are typical of a globular protein, apart from its roughly spherical shape.
(b)[5]
Several substances take part in the transport of respiratory gases. Complete Table 2.1 by naming the substance that matches the description of its role in respiratory-gas transport. The first row has already been filled in.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Hydrophilic R groups are positioned on the exterior in an aqueous environment” …