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

 

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