General Microbiology EXAM 3 Practice Questions
15. Any organism that can cause disease in the host after direct interaction is a
A. focal pathogen.
B. secondary pathogen.
C. opportunistic pathogen.
D. primary pathogen.
16. Inanimate materials involved in pathogen transmission are called fomites.
17. Infection specifically refers to the multiplication of a pathogen on or within a host, and
includes the resulting tissue invasion and damage.
18. Pathogenicity islands are typically associated with
A. genes encoding tRNA.
B. genes encoding rRNA.
C. G+C content similar to the rest of the bacterial genome.
D. none of the choices
19. Which of the following is used to help protect the lungs from infection?
A. Turbulent airflow deposits airborne pathogens on sticky mucosal surfaces.
B. The mucociliary escalator moves trapped organisms away from the lungs by ciliary action.
C. Coughing and sneezing forcefully expel organisms away from the lungs.
D. all of the choices
20. The skin surface (epidermis) is a very favorable environment for colonization by
21. Cervical mucus has antibacterial activity.
28. Pathogen associated molecular patterns (PAMPs) include
C. phospholipids of the cytoplasmic membrane.
D. two of the choices
E. all of the choices
22. In the case of the AB toxins, the function of the B subunit is to
A. have enzyme activity that causes toxicity.
B. act as a superantigen that stimulates T cells to release cytokines.
C. bind to host cell receptor.
D. act as a neurotoxin.
23. Which of the following is not a way in which fever augments the host's defenses?
A. enhances the activity of the immune system
B. stimulation of leukocytes into action so that they can kill the organism
C. inhibition of the parasite's growth by raising the temperature above the optimum growth
D. inhibition of growth by decreasing the availability of iron to the organism
A. play key roles in both specific and non-specific immunity.
B. play key roles in both specific and non-specific immunity and are required for regulation of
the immune response.
C. are required for regulation of the immune response.
D. cause lysis of invading microorganisms.
25. The alternate complement pathway plays an important role in
A. both innate immunity and specific immunity.
B. specific immunity.
C. innate immunity.
D. aquired immunity.
26. Dendritic cells
A. are mainly important in the defense against protozoan and helminth parasites.
B. contain granules with histamine and other pharmacologically active substances that contribute
to the inflammatory response.
C. are capable of recognizing specific pathogen-associated molecular patterns and play an
important role in non-specific resistance.
D. play an important role in the development of allergies and hypersensitivity.
27. Which of the following releases histamine?
A. mast cells
B. natural killer cells
C. plasma cells
E. none of the choices
28. Endotoxin is released when
A. gram negative pathogens lyse or divide.
B. cells are starved for iron.
C. cells are lysogenic for the beta phage.
D. all of the choices
29 Macrophages have surface receptors for all of the following except
A. mannose and fucose.
General microbiology exam 3 practice questions: any organism that can cause disease in the host after direct interaction is a, focal pathogen, secondary pathogen, opportunistic pathogen, primary pathogen, inanimate materials involved in pathogen transmission are called fomites. True false: infection specifically refers to the multiplication of a pathogen on or within a host, and includes the resulting tissue invasion and damage. True false: cervical mucus has antibacterial activity. True false: vaccines using inactivated pathogens do not stimulate cell-mediated immunity as effectively as vaccines using attenuated pathogens. True false: diphtheria is a contagious disease that spreads from person to person mainly by the fecal-oral route. True false: lyme disease is spread from human to human by mosquito vectors. True false: the drug level required for the clinical treatment of a particular infection is called the, minimal inhibitory concentration, therapeutic index, toxic dose, therapeutic dose, consider an antibacterial drug.