Sci 250 week 7 final exam

SCI250 Week 7 Final Examination – 4 points each.  Please highlight, check and or underline the most appropriate response for each question.

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

  • pink, clear.
  • pink, purple.
  • purple, pink.
  • purple, blue.

4.     Classification is necessary to _________

  • establish criteria for identifying organisms.
  • arrange related organisms into groups.
  • provide information about how organisms evolved.
  • All of the above

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

  • host.
  • commensal.
  • parasite.
  • symbiont.

6.     Undercooked pork is most likely to pass along ________

  • Schistosoma.
  • Tania.
  • Wuchereria.
  • Trichinella.

7.     Arthropods are responsible for transmitting _____ pathogens.

  • viral
  • bacterial
  • protozoan
  • viral, bacterial, and protozoan

8.     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.

9.     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.

10.  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

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

  • Antibiotics
  • Synthetic drugs
  • Semi-synthetic drugs
  • Antimicrobial agents
  • Chemotherapeutic agents

12.  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 sysnthesis
  • Inhibition of membrane permeability
  • Disruption of selective toxicity

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

  • Fever
  • Mucus
  • Antibodies
  • Interferon
  • Inflammation

14.  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

15.  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
  • Deodex
  • All of the above

16.  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

17.  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

18.  The upper respiratory tract consists of the ________

  • pharynx.
  • nasal cavity.
  • bronchi.
  • All of the above

19.  Group B Streptococcal disease include ________

  • early onset neonatal sepsis and meningitis.
  • late onset neonatal menegitis.
  • etiology is Streptococcus agakactiae.
  • All of the above

20.  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
  • Haemophilus influenzae
  • Streptococcus pneumoniae
  • Listeria monocytogenes

21.  Food contamination occurs as a result of ________

  • unsanitary practices by food handlers.
  • improper storage.
  • importation.
  • All of the above