What C gene segment is lacking a flanking switch sequence?

Which lymphocyte listed below has granules that stain with eosin (dark purple) and is involved in parasitic worm infections?

All of the following are light chain isotypes except:

A respiratory burst will be harmful to the pathogen in the phagosome, but it will also be harmful to other near by host cells. To prevent damage to these host cells, the respiratory burst is accompanied by the generation of which of the following enzymes?

Which of the following complement component/s lead to the initiation of the Lectin pathway?

Which of the following correctly describes the induced innate immune response?

Which antibody isotype is capable of crossing the placenta?

Which Ig is found in the highest abundance in the blood and provides the bulk of immunity against blood born infections?

Extravasation takes place in 4 steps and in the following order: 1) Rolling adhesion, 2) Diapedesis, 3) Tight binding, 4) Migration

In general, where would you expect to find the majority of amino acid differences between different IgE molecules in an individual?