Lesson 6.4.1
6.4.1 Antigens, antibodies and immune cells Quiz: Pearson Edexcel Biology, Unit 6
20 questions
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Lesson 6.4.1, Antigens, antibodies and immune cells: 20 multiple choice questions for the Pearson Edexcel Biology (9BI0), Unit 6: Immunity, Infection and Forensics, written with Revision Ninja.
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The 20 questions
-
What type of molecule is an antigen usually composed of?
- Triglyceride or phospholipid
- Glycoprotein or protein
- Starch or glycogen
- RNA or DNA
-
Which specific cells synthesise and secrete antibodies?
- Macrophages
- Cytotoxic T cells
- Helper T cells
- Plasma cells
-
Which polypeptide chain types make up an antibody molecule?
- Alpha and beta
- Major and minor
- Primary and secondary
- Heavy and light
-
What is the main function of the variable region of an antibody?
- Attaches to complement
- Forms disulfide bridges
- Binds specific antigens
- Binds to phagocytes
-
Which cells present antigen fragments on their surface to activate helper T cells?
- Neutrophils
- Plasma cells
- Erythrocytes
- Macrophages
-
What process describes antibodies binding pathogens together into clumps for easier phagocytosis?
- Neutralisation
- Opsonisation
- Agglutination
- Lysis
-
What term describes antibodies binding to bacterial toxins to block their interaction with host cells?
- Opsonisation
- Vaccination
- Agglutination
- Neutralisation
-
Which molecules on antigen-presenting cells display antigen fragments to T helper cells?
- Interleukins
- MHC class II
- MHC class I
- Antibodies
-
Which region of an antibody provides specificity for a particular antigen?
- Disulfide bridge
- Constant region
- Hinge region
- Variable region
-
What is the specific region of an antigen that binds to an antibody?
- Epitope
- Paratope
- Active site
- Constant region
-
Which type of cell acts as an antigen-presenting cell to activate T helper cells?
- Red blood cell
- Macrophage
- Neutrophil
- Mast cell
-
Which molecules are produced by plasma cells to bind specific foreign antigens?
- Histamines
- Interleukins
- Antigens
- Antibodies
-
Why can a single complex antigen trigger multiple different antibodies?
- Multiple epitopes
- Rapid mutation rate
- High glucose content
- Multiple cell nuclei
-
Which part of an antibody structure varies between different classes of immunoglobulin?
- Epitope site
- Variable region
- Antigen-binding site
- Constant region
-
What process involves antibodies coating pathogens to make phagocytosis more efficient?
- Neutralisation
- Lysis
- Opsonisation
- Agglutination
-
How do antibodies prevent bacterial toxins from harming host cells?
- Dissolving toxin membranes
- Blocking binding sites
- Synthesising antitoxins
- Engulfing toxin molecules
-
What primary mechanism do antibodies use to clump pathogens together?
- Neutralisation
- Opsonisation
- Phagocytosis
- Agglutination
-
Why is the initial immune response to a novel pathogen extremely slow?
- Antibodies are large
- Clonal selection required
- Phagocytosis is slow
- Antigens degrade fast
-
Which cell type releases cytokines to stimulate B cells to divide and differentiate?
- T helper cell
- T killer cell
- Neutrophil
- Plasma cell
-
Which molecule acts as a foreign antigen on the surface of an enveloped virus?
- Human MHC molecule
- Viral glycoprotein
- Host haemoglobin
- Bacterial peptidoglycan
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