Immunology - Biology Quiz

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Biology Quiz: Immunology

1. What is the term used to describe white blood cells migrating toward bacteria?
(a) Zeiosis
(b) Phagocytosis
(c) Chemotaxis
(d) Phototaxis

2. When human immunodeficiency virus (HIV) attaches to a host cell what genetic material is released into the cell's cytoplasm?
(a) Chromosome
(b) RNA
(c) DNA
(d) Ligand

3. What's the most active and voracious white blood cell in the human body?
(a) Platelet
(b) Eosinophil
(c) Macrophage
(d) Neutrophil
(e) Lymphocute

4. Name the process a cell such as a neutrophil or a macrophage uses to ingest (eat) its prey.
(a) Halitosis
(b) Chemotaxis
(c) Botulism
(d) Phagocytosis

5. Many people are allergic to the droppings of dust mites, tiny creatures related to...
(a) "true bugs"
(b) Wasps
(c) fruit flies
(d) Spiders

6. What's a specific term for a bacterial or other foreign protein that initiates antibody production by the body?
(a) Peptide
(b) MHC II molecule
(c) Complement
(d) Antigen

7. What product of the immune system attaches to bacteria, making them easier to eat by white blood cells?
(a) Hemoglobin
(b) Antibody
(c) Antigen

8. Which of these cell types can play a primary role in attacking and killing cancer cells?
(a) red blood cell
(b) cytotoxic T cell
(c) Platelet
(d) mast cell

9. What is the term applied to white blood cells squeezing between endothelial cells lining the blood vessel to reach the site of an infection?
(a) Diapedesis
(b) Chemotaxis
(c) Phagocytosis
(d) Enucleation

10. What main characteristic of HIV makes the virus difficult to treat with a single drug?
(a) its ability to destroy drugs
(b) impenetrable capsule
(c) Its ability to mutate

Answer Grid:
1.(a); 2.(a); 3.(d); 4.(d); 5.(d); 6.(d); 7.(b); 8.(b); (b); 9.(a);10.(c)

Tutorial for Correct Answers:

Question 1: Chemotaxis

Neutrophils are our body's first line of defense against bacterial infections. After leaving nearby blood vessels, these cells recognize chemicals produced by bacteria in a cut or scratch and migrate "toward the smell". In the lab, if neutrophils were placed in a gradient of fMLP (n formyl methionine- leucine- phenylalanine), a peptide chain is produced by some bacteria. The cells charge out like a "posse" after the bad guys. There are no bacteria in this sequence, but if there were, the white cells would eat them by the ...