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Microbiology and Immunology

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Quiz on Microbiology and Immunology
AchalaM
Quiz by AchalaM, updated more than 1 year ago
AchalaM
Created by AchalaM almost 10 years ago
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Resource summary

Question 1

Question
Which of the following is NOT a general shape/structure of bacteria and microbes?
Answer
  • Cocci (spherical)
  • Bacilli (rod shaped)
  • Sarcodina (circular)
  • Spirochetes (helical)

Question 2

Question
Which of the following is a property of gram positive (G+) cell walls?
Answer
  • They have two layers.
  • They have a thick peptidoglycan layer.
  • They have a periplasmic space.
  • The outer wall contains Lipid A.

Question 3

Question
Which of the following is true about gram negative (-) cell walls?
Answer
  • They have a periplasmic space.
  • They contain peptidoglycan.
  • They only have 1 layer that is very thick.
  • They contain teichoic acid.

Question 4

Question
How do bacteria attach to host cells?
Answer
  • Microvilli
  • Sticky enzymes
  • Pili

Question 5

Question
Which of the following can grow with or without oxygen?
Answer
  • Obligate aerobes
  • Obligate anaerobes
  • Facultative anaerobes
  • Facultative aerobes

Question 6

Question
Which of the following is true about toxins?
Answer
  • There are 220 known bacterial toxins and they fall under two groups: exotoxins and endotoxins.
  • Toxins are poisonous substances produced by microorganisms.
  • 40% of toxins cause disease by damaging the Eukaryotic cell membrane.
  • All of the above are true.

Question 7

Question
Which of the following exotoxins interefere with normal nerve impulses?
Answer
  • Cytotoxins
  • Neurotoxins
  • Enterotoxins

Question 8

Question
Endotoxins are part of the outer cell wall of Gram (-) bacteria.
Answer
  • True
  • False

Question 9

Question
Which of the following is true about bacteria cells?
Answer
  • They are eukaryotic.
  • They contain sterols.
  • The produce endospores.
  • They have glucans, mannans, and chitin in their cell wall.

Question 10

Question
Which of the following is true about fungi?
Answer
  • They are insensitive to antibiotics.
  • They are prokaryotic.
  • They have peptidoglycan in their cell wall.
  • They do not contain sterols.

Question 11

Question
Which of the following plasma membranes contains ergosterol?
Answer
  • Human plasma membrane
  • Fungal plasma membrane
  • Bacterial plasma membrane

Question 12

Question
Which of the following is a mycelial form of dimorphic fungi?
Answer
  • Parasitic form
  • Saprophytic form
  • Tissue form

Question 13

Question
Systemic fungal infectious agents are found in the skin, hair, and nails. They rarely invade deeper tissue. They are also called dermatophytes.
Answer
  • True
  • False

Question 14

Question
Proteinaceous infectious particles are:
Answer
  • prions
  • viruses
  • bacteria
  • parasite

Question 15

Question
Which of the following is FALSE about common virus structures?
Answer
  • Contain a viral genome of RNA or DNA
  • Contain a capsid
  • Genome is double stranded or single stranded
  • All of the above are true.

Question 16

Question
In which cycle is the viral genome integrated into the host?
Answer
  • Lytic cycle
  • Lysogenic cycle
  • Latent cycle

Question 17

Question
Which of the following pathways do retroviruses use?
Answer
  • RNA --> DNA --> mRNA --> Protein
  • DNA --> mRNA --> Protein
  • RNA --> mRNA --> Protein

Question 18

Question
Which of the following is NOT a type of parasite (main classifications)?
Answer
  • Protozoan
  • Trophozoite
  • Helminthe
  • Exoparasite

Question 19

Question
Which of the following is the active, free swimming stage of the protozoan?
Answer
  • Trophozoite
  • Cyst
  • Flagellate

Question 20

Question
Which of the following protozoans are incorrectly matched:
Answer
  • Amoeba - sarccodina
  • Flagellates - mastigophora
  • Ciliates - trematodes
  • Sporozoans - apicomyplexa

Question 21

Question
Which of the following hleminthes is associated with eating raw or undercooked meat of animals infected with its larvae?
Answer
  • Trematodes
  • Cestodes
  • Nematodes

Question 22

Question
Which of the following helminthes is associated with infection caused by ingestion of eggs shed in the feces of a human tapeworm carrier?
Answer
  • Trematodes
  • Cestodes
  • Nematodes

Question 23

Question
Which of the following helminthes is associated with blood flukes that target organs that are fed by blood?
Answer
  • Trematodes
  • Cestodes
  • Nematodes

Question 24

Question
Which of the following is NOT a possible effect of an antimicrobial drug?
Answer
  • Interruption of cell membrane structure/function
  • Inhibition of protein synthesis
  • Inhibition of nucleus formation
  • Interference with nucleic acid metabolism

Question 25

Question
What is virulence?
Answer
  • The degree of pathogenicity
  • The relative ability of a microorganism to cause disease
  • How capsules, toxins, enzymes, cell wall receptors, and pilli allow pathogens to evade or overcome host defenses
  • All of the above.

Question 26

Question
Which of the following is NOT a static defense (non-inflammatory reaction) of the body?
Answer
  • Skin
  • gastric pH
  • saliva
  • phagocytes

Question 27

Question
Which of the following is NOT true about the local inflammation response?
Answer
  • It is the second stage of the innate system.
  • Phagocytes respond to peptidoglycan and mannose.
  • Migration of phagocytes and plasma proteins to infected tissues occurs.
  • Maturation of WBCs occurs.

Question 28

Question
Which of the following cells recognize antigens on the surface of a virus-infected cell and bind to the cell to destroy it?
Answer
  • Cytotoxic T cells (killer T cells)
  • B cells
  • Helper T cells
  • All of the above.

Question 29

Question
MHC1 attached to CD8 cytotoxic T cells.
Answer
  • True
  • False

Question 30

Question
Which of the following is true about B lymphocytes?
Answer
  • They are formed in the thymus and undergo development in the bone marrow.
  • They are formed in the bone marrow and undergo development in the bone marrow.
  • They are formed in both the thymus and the bone marrow and undergo development in the blood.

Question 31

Question
Which of the following is NOT true about T lymphocytes?
Answer
  • T-lymphocytes migrate from the thymus to enter the bone marrow.
  • In the outer cortex of the thymus, T lymphocytes acquire specific receptors (TCRs) which commits it to a single antigen specificity.
  • T lymphocytes respond by proliferation and production of a clone of cells (clonal selection).
  • T lymphocytes differentiate to express CD3, CD4 and CD8 receptors.

Question 32

Question
T lymphocytes can become which of the following:
Answer
  • CD4+ (helper T cells)
  • CD8+ (killer T cells)
  • Cytotoxic cells
  • All of the above.

Question 33

Question
T lymphocytes can become which of the following:
Answer
  • CD4+ (helper T cells)
  • CD8+ (killer T cells)
  • Cytotoxic cells
  • All of the above.

Question 34

Question
Which of the following does a B lymphocyte NOT do when encountering an appropriate antigen?
Answer
  • Interact with antigenic epitopes.
  • Develop in plasma cells, secreting large amount of antibody.
  • Circulate as memory cells.
  • Hide antigenic peptides from T cells.

Question 35

Question
Which of the following immunoglobulin types works on parasites?
Answer
  • IgA
  • IgM
  • IgG
  • IgE

Question 36

Question
Which of the following is true about innate immunity?
Answer
  • Action requires days to develop.
  • Contains macrophages, granulocytes, natural killer cells, complements, HCl, lysozymes.
  • Response is specific.
  • Contains T cells and B cells.

Question 37

Question
Which of the following is true about the adaptive immunity response?
Answer
  • It contains macrophages and granulocytes.
  • It is non specific.
  • It can be humeral or cell mediated.
  • Its action is immediate.

Question 38

Question
Which of the following is NOT true about naturally passive acquired immunity?
Answer
  • It is a short term immunization.
  • It is not produced by the host.
  • The antibodies are passed through the placenta to the fetus.

Question 39

Question
Which of the following is an example of natural active acquired immunity?
Answer
  • Vaccination with live or killed infectious agents.
  • Measles or mumps.
  • Short term immunization
  • Placenta to fetus

Question 40

Question
A small molecule that can elicit an immune response only when attached to a large carrier (like a protein) is:
Answer
  • Immugen
  • Antigen
  • Pathogen
  • Hapten

Question 41

Question
Which of the following is not a main role of a complement?
Answer
  • Lysis of cells.
  • Attracting white blood cells.
  • Quarantining pathogens.
  • Enhancement of phagocytosis.
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