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WorksheetsImmunology Revision Quiz
Total questions: 10
Worksheet time: 5mins
Which of the following is a key feature of innate immunity?
Memory formation
Antigen specificity
Rapid response within hours
Clonal expansion
The main antibody in saliva, protecting against oral pathogens, is:
IgM
IgG
IgE
IgA
Which cell type is the primary antigen-presenting cell (APC)?
Neutrophil
Dendritic cell
NK cell
Mast cell
Which MHC class presents peptides to CD8+ cytotoxic T cells?
MHC I
MHC II
Both I and II
None
A patient develops gingival swelling with eosinophil infiltration. This response is most likely due to:
Bacterial infection
Fungal infection
Allergic reaction
Viral infection
In phagocytosis, which molecule enhances attachment of the microbe to phagocyte?
MHC I
CD28
Opsonins (C3b, IgG)
Histamine
A 25-year-old woman presents with recurrent oral thrush. Her lab results show low CD4+ T-cell count. The most likely explanation is:
Defective B-cell function
HIV infection leading to impaired cell-mediated immunity
Overproduction of IgE
Complement deficiency
A patient with suspected diphtheria undergoes Elek’s test. Precipitation lines are seen where the organism streak intersects with antitoxin strip. This indicates:
Agglutination
Toxigenicity of C. diphtheriae
Viral infection
Presence of IgM antibodies
Before oral surgery, a patient is screened for Hepatitis B using ELISA. Which principle does this test use?
Antigen-antibody reaction with color change due to enzyme activity
Precipitation of antigen-antibody complexes
Agglutination of RBCs
Complement fixation
A 40-year-old male with chronic periodontitis has elevated serum IgG against Porphyromonas gingivalis. This antibody most likely helps by:
Lysing bacteria directly
Acting as opsonin and activating complement
Presenting antigen to T-cells
Degrading bacterial toxins