Antibodies -Multiple Choice Questions Quiz

Question 1: What are antibodies?

(a) Small molecules produced by cells
(b) Bacteria that cause infections
(c) Proteins produced by the immune system
(d) Viruses that attack host cells

Question 2: Which type of immune cells are responsible for producing antibodies?

(a) T cells
(b) B cells
(c) Macrophages
(d) Natural killer cells

Question 3: What is the primary function of antibodies in the immune system?

(a) Directly attacking pathogens
(b) Producing antigens
(c) Activating T cells
(d) Recognizing and neutralizing antigens

Question 4: What is the basic Y-shaped structure of an antibody called?

(a) Antigen
(b) Epitope
(c) Paratope
(d) Monomer

Question 5: Which antibody class is the most abundant in the bloodstream?

(a) IgA
(b) IgD
(c) IgE
(d) IgG

Question 6: What is the term for the initial encounter between an antigen and the immune system that triggers antibody production?

(a) Immune response
(b) Antibody secretion
(c) Antigen recognition
(d) Primary immune activation

Question 7: Which type of antibody is involved in allergic reactions and defense against parasitic infections?

(a) IgA
(b) IgD
(c) IgE
(d) IgM

Question 8: What is the main function of IgA antibodies?

(a) Cross the placenta to provide fetal immunity
(b) Activate complement proteins
(c) Bind to mast cells and basophils
(d) Protect mucosal surfaces

Question 9: Which class of antibodies is involved in the primary immune response and is the first to be produced upon exposure to a new antigen?

(a) IgA
(b) IgM
(c) IgG
(d) IgE

Question 10: What is the phenomenon where antibodies bind to antigens and mark them for destruction by immune cells?

(a) Opsonization
(b) Phagocytosis
(c) Antibody-dependent cellular cytotoxicity (ADCC)
(d) Complement activation

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Results:

Total score: /10

Answer key:

Question 1: c

Question 2: b

Question 3: d

Question 4: c

Question 5: d

Question 6: c

Question 7: c

Question 8: d

Question 9: b

Question 10: a