SCI250 WEEK 7 FINAL EXAM 2017

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 .  log 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 compete with opportunists .

B .  sphincter muscles .

C .  flushing action of fluids .

D .  lowpH.

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 .  lungs

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

 

 

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