Which of the following best defines an antigen (Ag)?

Immunology Quiz

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Shokri Mohsen
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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A low molecular weight molecule that cannot induce immune response by itself
A substance that induces a specific immune response and binds to immune products
A molecule that only activates T cells but not B cells
A molecule that acts as a carrier for haptens only
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following statements about haptens is TRUE?
Haptens are complete antigens and can induce an immune response on their own
Haptens must bind to DNA to become immunogenic
Haptens require a carrier molecule to become immunogenic
Haptens are high molecular weight and chemically complex
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is considered a hapten in clinical medicine?
Hemoglobin
Penicillin
Insulin
Tubulin
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The part of the antigen that is specifically recognized by the immune system is known as:
Immunogen
Adjuvant
Epitope
Hapten
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement accurately differentiates affinity and avidity?
Affinity is the overall strength of binding, while avidity is single interaction strength
Affinity applies only to B cells, avidity to T cells
Affinity is the strength of a single interaction; avidity is the sum of all interactions
Affinity is relevant only for multivalent antigens
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following factors does NOT enhance immunogenicity?
Chemical complexity
Large molecular size
Self-origin of the antigen
Presence of adjuvants
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is TRUE about T cell-independent antigens?
They require antigen presentation via MHC molecules
They need B and T cell cooperation
They can stimulate antibody production without T cell help
They are usually proteins with complex structures
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which route of antigen administration generally elicits the strongest immune response?
Intravenous
Subcutaneous
Oral
Intramuscular
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