micro final to be completed

SCI250 Week 7 Final Examination

Section: Multiple Choice

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

· A. They produce antibiotics.

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

· C. They decompose dead animals.

· D. They all cause disease in humans.

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

· A. lag phase

· B. stationary phase

· C. doubling phase

· D. dog phase

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

· A. Gram stain

· B. Schaeffer-Fulton

· C. acid-fast stain

· D. flagellar stain

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

· A. pink, clear.

· B. pink, purple.

· C. purple, pink.

· D. purple, blue.

5. Classification is necessary to _________

· A. establish criteria for identifying organisms.

· B. arrange related organisms into groups.

· C. provide information about how organisms evolved.

· D. All of the above

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

· A. host.

· B. commensal.

· C. parasite.

· D. symbiont.

7. Undercooked pork is most likely to pass along ________

· A. Schistosoma.

· B. Tania.

· C. Wuchereria.

· D. Trichinella.

8. Arthropods are responsible for transmitting _____ pathogens.

· A. viral

· B. bacterial

· C. protozoan

· D. viral, bacterial, and protozoan

9. Symbiosis is an association between ________

· A. two or more species.

· B. one or two species.

· C. two or more hosts.

· D. no species but all hosts.

· E. all species but not hosts.

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

· A. Sickle cell anemia patients are resistant to malaria.

· B. Bacterial infections can lead to endocarditis.

· C. Viral infections invariably lead to nutritional deficiency.

· D. 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?

· A. Maturation, adsorption, penetration, release

· B. Adsorption, penetration, release, maturation

· C. Adsorption, penetration, synthesis, maturation

· D. Adsorption, penetration, maturation, synthesis

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

· A. Antibiotics

· B. Synthetic drugs

· C. Semi-synthetic drugs

· D. Antimicrobial agents

· E. Chemotherapeutic agents

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

· A. Action as an antimetabolite

· B. Inhibition of protein synthesis

· C. Inhibition of cell wall sysnthesis

· D. Inhibition of membrane permeability

· E. Disruption of selective toxicity

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

· A. Fever

· B. Mucus

· C. Antibodies

· D. Interferon

· E. Inflammation

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

· A. Antibody

· B. Antigen

· C. Agglutinin

· D. Antitoxin

· E. 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?

· A. Staphylococcus

· B. Corynebacterium

· C. E. coli

· D. Demodex

· E. All of the above

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

· A. normal flora complete with opportunists.

· B. sphincter muscles.

· C. flushing action of fluids.

· D. low pH.

· E. All of the above

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

· A. Clostridium botulinum — enterotoxin which is heat liable

· B. Staphylococcus aureus — enterotoxin which is heat stable

· C. Pseudomonas cocovenenans — bongkrek disease

· D. Bacillus cereus — toxin is an emetic

· E. 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 menegitis.

· C. etiology is Streptococcus agakactiae.

· 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?

· A. Neisseria meningitidis

· B. Haemophilus influenzae

· C. Haemophilus influenzae

· D. Streptococcus pneumoniae

· E. 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