MIC 205 FINAL EXAM 2024 WITH 100% CORRECT ANSWERS
If you were to Gram stain cell walls like those in Figure 1, after the addition of mordant (Gram's iodine):
a. A would be purple
b. B would be purple
c. Both A and B would be purple
d. Neither A nor B would be purple
e. The answer cannot...
If you were to Gram stain cell walls like those in Figure 1, after the addition of mordant (Gram's iodine):
a. A would be purple
b. B would be purple
c. Both A and B would be purple
d. Neither A nor B would be purple
e. The answer cannot be determined - correct answer✔✔ c. Both A and B would be purple
Which of the cells in Figure 1 is producing glycocalyx?
a. A
b. B
c. Both
d. Neither
e. Cannot be determined - correct answer✔✔ e. Cannot be determined
Round bacteria in cube-like groupings of 8 cells would be:
a. Staphylococci
b. Streptococci
c. Cocci in sarcinae
d. Streptobacilli
e. Bacilli in tetrads - correct answer✔✔ c. Cocci in sarcinae
,Which is NOT true of bacteria?
a. They contain peptidoglycan in their cell walls.
b. They have single, circular chromosomes.
c. They may be divided into true bacteria and archaea.
d.The vast majority are non-pathogenic.
e. You carry 10x as many of these cells as your own human cells. - correct answer✔✔ c. They may be
divided into true bacteria and archaea.
Which is correct?
a. Bacillus anthracis is pathogenic only if the strain is capsule-producing. The disease caused by B.
anthracis is commonly known as anthrax.
b. Bacillus anthracis is pathogenic only if the strain is capsule-producing. The disease caused by Bacillus
anthracis is commonly known as anthrax.
c. Bacillus anthracis is pathogenic only if the strain is capsule-producing. The disease caused by B.
anthracis is commonly known as anthrax.
d. Bacillus anthracis is pathogenic only if the strain is capsule-producing. The disease caused by B.
anthracis is commonly known as anthrax.
e. Bacillus anthracis is pathogenic only if the strain is capsule-producing. The disease caused by B.
anthracis is commonly known as anthrax. - correct answer✔✔ e. Bacillus anthracis is pathogenic only if
the strain is capsule-producing. The disease caused by B. anthracis is commonly known as anthrax.
Which pairing is correct?
a. Louis Pasteur - Germ theory of disease
b. Robert Koch - Discovery of the first cells
c. Antoni van Leeuwenhoek - Discovery of the first cells (microbial, credit given for this answer)
d. Edward Jenner - Validation of the etiologic agents of disease via postulates
e. Joseph Lister - theory of biogenesis - correct answer✔✔ a. Louis Pasteur - Germ theory of disease
c. Antoni van Leeuwenhoek - Discovery of the first cells (microbial, credit given for this answer)
,Place the following events in the correct order. A) Structure of DNA elucidated. B) first cells observed. C)
First microorganisms observed. D) Koch's postulates E) Spontaneous generation disproved.
a. A,B,C,D,E
b. B,C,E,D,A
c. E,D,C,B,A
d. E,D,B,C,A
e. B,E,D,A,C - correct answer✔✔ b. B,C,E,D,A
Which is TRUE regarding Gram positive cells.
a. They contain relatively little peptidoglycan as compared to Gram negative cells.
b. They contain a cell wall component toxic to humans.
c. They have two membranes, one on either side of the peptidoglycan layer.
d. They stain purple after the addition of crystal violet, which is removed by the alcohol wash step.
e. Endospore forming bacteria belong to this group. - correct answer✔✔ e. Endospore forming bacteria
belong to this group.
A coworker identifies a cell which is covered in cilia, feeds by phagocytosis and has mitochondria
containing 70S ribosomes. What can you tell her about this cell?
a. It is a prokaryotic cell
b. It is a eukaryotic cell
c. It is a member of the Achaea
d. It can be treated by antibiotics
e. These results are inconsistent and some of her observations should be repeated. - correct answer✔✔
b. It is a eukaryotic cell
Agents which prevent bacterial cells from dividing are:
, a. Disinfectants
b. Antibiotics
c. Bacteriostatic
d. Antiseptics
e. Bactericidal - correct answer✔✔ c. Bacteriostatic
You buy the newest silver sport gear on the market, and it promises to reduce stinky foot bacteria by
99.9% after 3 hours of running. If you started with 1x105 bacteria on your stinky foot, how many are left
when you get back from the marathon? (Assume you ran the marathon in 3 hours, you've been
training.)
a. Only 1!
b. Only 10!
c. Only 100!
d. Only 1,000!
e. Only 10,000! - correct answer✔✔ c. Only 100!
Which would be the most appropriate way to disinfect a box of plastic microfuge tubes?
a. Autoclave
b. Microwave
c. Gamma irradiation
d. Ethylene oxide
e. These can't be disinfected - correct answer✔✔ c. Gamma irradiation
A culture medium which is solidified with agar; contains an antibiotic and blood; changes color when
xylose is fermented; and has been struck for isolation could be described as all of the following EXCEPT:
a. Differential
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