MEDIUM
AS and A Level
IMPORTANT
Earn 100
Explain the difference between a pathogen and an antigen.
Important Questions on Immunity
MEDIUM
AS and A Level
IMPORTANT
The receptors on the surface of the mature B cells illustrated in the above figure are not drawn to scale. Receptors on cell surfaces are not visible at this magnification but can be shown in diagrams like this. Discuss why each clone only has one type of B cell receptor.
MEDIUM
AS and A Level
IMPORTANT
Analogies are often useful in science. An analogy is used to try to explain an unfamiliar topic by comparing it to something that is more familiar, for example, the action of the heart is often compared with a pump. Try to think of an analogy to explain clonal selection.
EASY
AS and A Level
IMPORTANT
Explain why B cells divide by mitosis during an immune response.
MEDIUM
AS and A Level
IMPORTANT
Look at the above figure, and explain why is it important that the constant region of all antibodies is the same.
MEDIUM
AS and A Level
IMPORTANT
Explain why the antibody molecules are shown in the above figure:
- Shows all four levels of protein structure.
- Is a glycoprotein.
EASY
AS and A Level
IMPORTANT
Explain why polysaccharides would not be suitable for making antibody molecules.
MEDIUM
AS and A Level
IMPORTANT
Use the concept of cell signalling to make a diagram showing how T-helper cells coordinate the activity of other lymphocytes during an immune response.
MEDIUM
AS and A Level
IMPORTANT
Outline the sequence of events that follows the release of a toxin by Corynebacterium diphtheria, the causative organism of diphtheria.
