Biology Test Immunology 2

Question 1

Which type of hypersensitivity reaction involves IgE-mediated mast cell degranulation?

Accepted Answer

Type I

Answer

Type II

Answer

Type III

Answer

Type IV

Question 2

What is the primary function of regulatory T cells (Tregs)?

Accepted Answer

Suppress immune responses to prevent autoimmunity

Answer

Kill virus-infected cells

Answer

Produce antibodies

Answer

Present antigens to B cells

Question 3

Which complement pathway is activated by mannose-binding lectin (MBL)?

Accepted Answer

Lectin pathway

Answer

Classical pathway

Answer

Alternative pathway

Answer

Terminal pathway

Question 4

During an immune response, affinity maturation occurs in which structure?

Accepted Answer

Germinal centers of lymph nodes

Answer

Thymus

Answer

Bone marrow

Answer

Spleen red pulp

Question 5

Which molecule serves as a co-receptor for CD4+ T cells during antigen recognition?

Accepted Answer

MHC class II

Answer

CD8

Answer

MHC class I

Answer

CD28

Question 6

What is opsonization in the context of innate immunity?

Accepted Answer

Coating pathogens with antibodies or complement to enhance phagocytosis

Answer

Killing bacteria with reactive oxygen species

Answer

Releasing cytokines to recruit neutrophils

Answer

Forming membrane attack complexes on bacteria

Question 7

Which interleukin is primarily responsible for driving the differentiation of naive T cells into Th17 cells?

Accepted Answer

TGF-β + IL-6

Answer

IL-4

Answer

IL-12

Answer

IFN-γ