Immunity: Practice Questions

The diagram shows the structure of an antibody molecule.
Which part of the molecule determines its specificity<\/b> for a particular antigen? <\/p>

A student plotted a graph of the antibody concentration in the blood following an initial vaccination and a later booster injection of the same vaccine.
What explains the faster and greater<\/b> increase in antibody concentration after the booster injection? <\/p>

A patient is infected with a pathogen for the second time. Compared to the body's first encounter with this pathogen, which characteristics would primarily define the subsequent immune response?

Which type of immunity is acquired by a fetus when antibodies pass from the mother across the placenta? <\/p>

During the production of monoclonal antibodies using the hybridoma method<\/b>, which two types of cells are fused together? <\/p>

Explain how the variable region of an antibody molecule contributes to its specific function.

Differentiate between active immunity and passive immunity, providing an example for each type.

Explain the detailed sequence of events during a secondary immune response upon re-exposure to a pathogen, highlighting the role of memory cells.

Phagocytes, such as neutrophils, provide a non-specific defense against pathogens.
(a) Describe the process of phagocytosis once a neutrophil has successfully encountered a pathogen. [3]
(b) State the name of the tissue in the human body where neutrophils are produced. [1]

Antibodies are globular proteins that exhibit quaternary structure and play a vital role in the immune system.
(a) Describe how the molecular structure of an antibody molecule is related to its specific function. [4]
(b) Identify the specific cell type that is responsible for secreting antibody molecules into the blood plasma. [1]