Pregunta 1
Pregunta
Which of the following is NOT a general shape/structure of bacteria and microbes?
Respuesta
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Cocci (spherical)
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Bacilli (rod shaped)
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Sarcodina (circular)
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Spirochetes (helical)
Pregunta 2
Pregunta
Which of the following is a property of gram positive (G+) cell walls?
Respuesta
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They have two layers.
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They have a thick peptidoglycan layer.
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They have a periplasmic space.
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The outer wall contains Lipid A.
Pregunta 3
Pregunta
Which of the following is true about gram negative (-) cell walls?
Respuesta
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They have a periplasmic space.
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They contain peptidoglycan.
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They only have 1 layer that is very thick.
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They contain teichoic acid.
Pregunta 4
Pregunta
How do bacteria attach to host cells?
Respuesta
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Microvilli
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Sticky enzymes
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Pili
Pregunta 5
Pregunta
Which of the following can grow with or without oxygen?
Respuesta
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Obligate aerobes
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Obligate anaerobes
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Facultative anaerobes
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Facultative aerobes
Pregunta 6
Pregunta
Which of the following is true about toxins?
Respuesta
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There are 220 known bacterial toxins and they fall under two groups: exotoxins and endotoxins.
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Toxins are poisonous substances produced by microorganisms.
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40% of toxins cause disease by damaging the Eukaryotic cell membrane.
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All of the above are true.
Pregunta 7
Pregunta
Which of the following exotoxins interefere with normal nerve impulses?
Respuesta
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Cytotoxins
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Neurotoxins
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Enterotoxins
Pregunta 8
Pregunta
Endotoxins are part of the outer cell wall of Gram (-) bacteria.
Pregunta 9
Pregunta
Which of the following is true about bacteria cells?
Pregunta 10
Pregunta
Which of the following is true about fungi?
Respuesta
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They are insensitive to antibiotics.
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They are prokaryotic.
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They have peptidoglycan in their cell wall.
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They do not contain sterols.
Pregunta 11
Pregunta
Which of the following plasma membranes contains ergosterol?
Pregunta 12
Pregunta
Which of the following is a mycelial form of dimorphic fungi?
Respuesta
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Parasitic form
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Saprophytic form
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Tissue form
Pregunta 13
Pregunta
Systemic fungal infectious agents are found in the skin, hair, and nails. They rarely invade deeper tissue. They are also called dermatophytes.
Pregunta 14
Pregunta
Proteinaceous infectious particles are:
Respuesta
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prions
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viruses
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bacteria
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parasite
Pregunta 15
Pregunta
Which of the following is FALSE about common virus structures?
Respuesta
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Contain a viral genome of RNA or DNA
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Contain a capsid
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Genome is double stranded or single stranded
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All of the above are true.
Pregunta 16
Pregunta
In which cycle is the viral genome integrated into the host?
Respuesta
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Lytic cycle
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Lysogenic cycle
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Latent cycle
Pregunta 17
Pregunta
Which of the following pathways do retroviruses use?
Pregunta 18
Pregunta
Which of the following is NOT a type of parasite (main classifications)?
Respuesta
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Protozoan
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Trophozoite
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Helminthe
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Exoparasite
Pregunta 19
Pregunta
Which of the following is the active, free swimming stage of the protozoan?
Respuesta
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Trophozoite
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Cyst
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Flagellate
Pregunta 20
Pregunta
Which of the following protozoans are incorrectly matched:
Pregunta 21
Pregunta
Which of the following hleminthes is associated with eating raw or undercooked meat of animals infected with its larvae?
Respuesta
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Trematodes
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Cestodes
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Nematodes
Pregunta 22
Pregunta
Which of the following helminthes is associated with infection caused by ingestion of eggs shed in the feces of a human tapeworm carrier?
Respuesta
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Trematodes
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Cestodes
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Nematodes
Pregunta 23
Pregunta
Which of the following helminthes is associated with blood flukes that target organs that are fed by blood?
Respuesta
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Trematodes
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Cestodes
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Nematodes
Pregunta 24
Pregunta
Which of the following is NOT a possible effect of an antimicrobial drug?
Respuesta
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Interruption of cell membrane structure/function
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Inhibition of protein synthesis
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Inhibition of nucleus formation
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Interference with nucleic acid metabolism
Pregunta 25
Pregunta
What is virulence?
Respuesta
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The degree of pathogenicity
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The relative ability of a microorganism to cause disease
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How capsules, toxins, enzymes, cell wall receptors, and pilli allow pathogens to evade or overcome host defenses
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All of the above.
Pregunta 26
Pregunta
Which of the following is NOT a static defense (non-inflammatory reaction) of the body?
Respuesta
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Skin
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gastric pH
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saliva
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phagocytes
Pregunta 27
Pregunta
Which of the following is NOT true about the local inflammation response?
Respuesta
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It is the second stage of the innate system.
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Phagocytes respond to peptidoglycan and mannose.
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Migration of phagocytes and plasma proteins to infected tissues occurs.
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Maturation of WBCs occurs.
Pregunta 28
Pregunta
Which of the following cells recognize antigens on the surface of a virus-infected cell and bind to the cell to destroy it?
Pregunta 29
Pregunta
MHC1 attached to CD8 cytotoxic T cells.
Pregunta 30
Pregunta
Which of the following is true about B lymphocytes?
Respuesta
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They are formed in the thymus and undergo development in the bone marrow.
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They are formed in the bone marrow and undergo development in the bone marrow.
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They are formed in both the thymus and the bone marrow and undergo development in the blood.
Pregunta 31
Pregunta
Which of the following is NOT true about T lymphocytes?
Respuesta
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T-lymphocytes migrate from the thymus to enter the bone marrow.
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In the outer cortex of the thymus, T lymphocytes acquire specific receptors (TCRs) which commits it to a single antigen specificity.
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T lymphocytes respond by proliferation and production of a clone of cells (clonal selection).
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T lymphocytes differentiate to express CD3, CD4 and CD8 receptors.
Pregunta 32
Pregunta
T lymphocytes can become which of the following:
Respuesta
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CD4+ (helper T cells)
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CD8+ (killer T cells)
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Cytotoxic cells
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All of the above.
Pregunta 33
Pregunta
T lymphocytes can become which of the following:
Respuesta
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CD4+ (helper T cells)
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CD8+ (killer T cells)
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Cytotoxic cells
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All of the above.
Pregunta 34
Pregunta
Which of the following does a B lymphocyte NOT do when encountering an appropriate antigen?
Respuesta
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Interact with antigenic epitopes.
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Develop in plasma cells, secreting large amount of antibody.
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Circulate as memory cells.
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Hide antigenic peptides from T cells.
Pregunta 35
Pregunta
Which of the following immunoglobulin types works on parasites?
Pregunta 36
Pregunta
Which of the following is true about innate immunity?
Respuesta
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Action requires days to develop.
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Contains macrophages, granulocytes, natural killer cells, complements, HCl, lysozymes.
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Response is specific.
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Contains T cells and B cells.
Pregunta 37
Pregunta
Which of the following is true about the adaptive immunity response?
Pregunta 38
Pregunta
Which of the following is NOT true about naturally passive acquired immunity?
Respuesta
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It is a short term immunization.
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It is not produced by the host.
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The antibodies are passed through the placenta to the fetus.
Pregunta 39
Pregunta
Which of the following is an example of natural active acquired immunity?
Pregunta 40
Pregunta
A small molecule that can elicit an immune response only when attached to a large carrier (like a protein) is:
Respuesta
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Immugen
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Antigen
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Pathogen
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Hapten
Pregunta 41
Pregunta
Which of the following is not a main role of a complement?