The antibody isotype that provides immunity against helminths and is capable of sensitising mast cells resulting in the induction of an allergic response is

Correct Answer: B

Rationale: IgE targets helminths and triggers mast cell degranulation in allergies.

Correct Answer: A

Rationale: Paratope is the antibody site, not epitope ; epitope , IgG bivalence , and heavy chain class are true.

Correct Answer: C

Rationale: Plasma cells secrete antibodies; memory cells persist, basophils release histamine.

Correct Answer: C

Rationale: Hybridoma technology produces monoclonal antibodies; not fermentation or PCR .

Correct Answer: D

Rationale: Bone marrow-derived and thymus-derived (T) lymphocytes somatically generate receptors during development. Unlike natural killer cells, B cells and T cells are unable to assess the quantity of MHC class I molecules on nucleated cells. Unlike innate immune system receptors, B- and T-lymphocyte somatic receptors are randomly generated and vary greatly between individuals. B- and T-lymphocytes receptors are formed prior to antigen stimulation.