Sci250 week 7 final examination


SCI250 Week 7 Final Examination






Section: Multiple Choice








1. Which of the following is NOT true of microorganisms?





· They produce antibiotics.


· They are used in the production of many types of food and beverages.


· They decompose dead animals.


· They all cause disease in humans.







2. Which of the following is NOT one of the phases of bacterial growth?





· lag phase


· stationary phase


· doubling phase


· log phase







3. Which of the following is NOT a differential stain?





· Gram stain


· Schaeffer-Fulton


· acid-fast stain


· flagellar stain







4. In a properly executed Gram stain, Gram positive organisms appear ______ while Gram negative




organisms appear ______





· pink, clear.


· pink, purple.


· purple, pink.


· purple, blue.







5. Classification is necessary to _________





· establish criteria for identifying organisms.


· arrange related organisms into groups.


· provide information about how organisms evolved.


· All of the above







6. An organism that lives at the expense of another organism is a ________





· host.


· commensal.







· parasite.




· symbiont.








7. Undercooked pork is most likely to pass along ________






· Schistosoma.




· Taenia.




· Wuchereria.




· Trichinella.








8. Arthropods are responsible for transmitting _____ pathogens.






· viral




· bacterial




· protozoan




· viral, bacterial, and protozoan








9. Symbiosis is an association between ________






· two or more species.




· one or two species.




· two or more hosts.




· no species but all hosts.




· all species but not hosts.








10. All of the following are true of the relationship between microorganisms and diseases EXCEPT:






· Sickle cell anemia patients are resistant to malaria.




· Bacterial infections can lead to endocarditis.




· Viral infections invariably lead to nutritional deficiency.




· Infections in the brain can result in mental disease.








11. Which of the following represents the correct order of steps in a typical viruses replication cycle?






· Maturation, adsorption, penetration, release




· Adsorption, penetration, release, maturation




· Adsorption, penetration, synthesis, maturation




· Adsorption, penetration, maturation, synthesis








12. What special group of chemical substances are used to treat diseases by microbes?






· Antibiotics




· Synthetic drugs








· Semi-synthetic drugs




· Antimicrobial agents




· Chemotherapeutic agents








13. Which of the following is NOT considered a mode of action by antimicrobial agents?






· Action as an antimetabolite




· Inhibition of protein synthesis




· Inhibition of cell wall synthesis




· Inhibition of membrane permeability




· Disruption of selective toxicity








14. All of the following characteristics are components of nonspecific host defenses EXCEPT:






· Fever




· Mucus




· Antibodies




· Interferon




· Inflammation








15. What name is given to a substance that is recognized by the body as foreign and normally produces an




immune response?






· Antibody




· Antigen




· Agglutinin




· Antitoxin




· Apoptosis








16. There are a number of different species that can live on the skin as resident microflora. Which of the




following is NOT considered resident microflora of the skin?






· Staphylococcus




· Corynebacterium




· E. coli




· Demodex




· All of the above








17. Defense mechanisms in the urogenital system are numerous and include ________






· normal flora complete with opportunists.


· sphincter muscles.




· flushing action of fluids.




· low pH.




· All of the above








18. Food poisoning can be caused by a variety of microbes. Which of the following pairs is incorrect?






· Clostridium botulinum — enterotoxin which is heat liable




· Staphylococcus aureus — enterotoxin which is heat stable




· Pseudomonas cocovenenans — bongkrek disease




· Bacillus cereus — toxin is an emetic




· Clostridium perfringens — enterotoxin and wound infection








19. The upper respiratory tract consists of the ________




A. pharynx.




B. nasal cavity.




C. bronchi.




D. All of the above




E. Only A and B




20. Group B Streptococcal disease include ________




A. early onset neonatal sepsis and meningitis.




B. late onset neonatal meningitis.




C. etiology is Streptococcus agalactiae.




D. All of the above




E. Only A and C




21. In closed environments, such as military bases, dormitories, and day-care centers, 90% of the population




can be carriers of this organism, yet only 1 per 1000 develops the meningitis. What is the etiology?






· Neisseria meningitidis




· Haemophilus influenzae




· Streptococcus pneumoniae




· Listeria monocytogenes








22. Food contamination occurs as a result of ________




A. unsanitary practices by food handlers.




B. improper storage.






C. importation.




D. All of the above




E. Only A and B




SCI 250 v3 appendix C

SCI250 Week 1 Chapter 3 Staining Lab Quiz

SCI250 Week 5 Chapter 19 Integumentary System Quiz

SCI250 Week 6 Chapter 21 Respiratory System Quiz

SCI250 Week 7 Final Examination

SCI250 Week 7 Chapter 24 Nervous System Quiz
















































































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