MIC 205 FINAL EXAM 2024 WITH 100% CORRECT ANSWERS
Which of the following bacterial species are capable of converting nitrogen gas in the atmosphere into compounds that other organisms can better utilize? - correct answer Rhizobium spp. : gram -, fix nitrogen
Of the bacterial species listed ...
Which of the following bacterial species are capable of converting nitrogen gas in the atmosphere into
compounds that other organisms can better utilize? - correct answer✔✔ Rhizobium spp. : gram -, fix
nitrogen
Of the bacterial species listed below, which do not utilize type IV secretion to transfer DNA or proteins
into eukaryotic cells? - correct answer✔✔ Neisseria gonorrhoeae Type V secretion
After graduating from the University of Arizona you decided to become a benthic marine biologist
(studying the sea floor). Your have been using large dragnets to collect sea floor marine life. In your first
net you see a new species of anglerfish. These fish have a light organ protruding in front of their mouth
that is used to attract prey fish in the dark depths of the ocean. You suspect that the light organ will
contain bacteria. What species from the list below do you suspect is most likely to have colonized the
light organ? - correct answer✔✔ (Alii)Vibrio fischeri - Aliivibrio fisheri; produce visible light at high
bacterial concentrations.
Hans Christian Gram is famous for developing a staining technique that separates pathogenic bacteria
into two roughly equal sized groups. He originally developed this technique to differentiate two bacteria
(one a bacillus and one a coccus) that were causing the same disease. Which of the bacteria below was
the bacillus in his samples? - correct answer✔✔ Klebsiella pneumoniae : bacillus
The one thing you learned by your summer at sea (question #3) is that you do not like water. You
decided to return to the arid lands of Arizona where rivers only have water flowing in them a few weeks
out of the year. As fortune would have it, you have been accepted into the UofA medical school. In your
surgical rotation you will be learning under the tutelage of Dr. Yavan Knowsomuch. On the first day with
her, Dr. Knowsomuch offhandedly remarks that her patients keep developing colitis after they are
discharged from her care. What species of bacteria do you suspect is causing these symptoms? - correct
answer✔✔ Clostridium difficile :colitis is a chronic, inflammatory bowel disease
Robert Koch was one of the scientists in the late 19th century involved in developing the Germ Theory.
This theory states that diseases are caused by microscopic organisms. Dr. Koch's lasting contribution to
this theory was a systematic approach for identifying the microbial cause of a disease. We call this
,approach Koch's Postulates. What were the declarative statements? - correct answer✔✔ a. You must
find the microbe in all cases of the disease.
b. You must be able to grow the microbe in a pure culture.
c. The pure culture must be able to cause the same disease in a new individual.
d. You must be able to re-isolate the original organism from individual infected in part C.
True or False - Koch's Postulates have been used to show that all known diseases are microbial in origin.
- correct answer✔✔ False: Not known, only a method to prove what causes disease. Not all diseases are
microbial in origin; example: genetic diseases.
Which scientist is remembered for having developed the first microscope that could resolve
microorganisms? Lecture - correct answer✔✔ Dr. Antonie van Leeuwenhoek: compound microscope
Which domain of life contains microorganisms - correct answer✔✔ a. Eubacteria
b. Eukaryotes
c. Archaea
True or False - The human body contains 10 times more prokaryotic cells than eukaryotic cells. - correct
answer✔✔ True: We have more microorganisms on our bodies than our own cells.
Clostridium botulinum is a Gram-positive spore-forming bacterium that produces a toxin that can block
the release of neurotransmitters from human neurons. The purified toxin has been shown to be useful
in the treatment of which of the following diseases:
A. Aging
b. Diarrhea
c. The flu
d. Alcoholism
e. Botox will not prevent or treat any of these diseases - correct answer✔✔ e. Botox will not prevent or
treat any of these diseases
, I am sure you took the time to study osmosis. Here is your chance to be rewarded. What would happen
to a bacterial cell if you placed it in an isotonic solution? - correct answer✔✔ Nothing would happen to
the bacterial cell. because of cell wall
Which of the following statements best characterizes the role of ATP in active transport? - correct
answer✔✔ ATP hydrolysis generates the energy to move a compound from a low concentration outside
the cell into the high concentration inside the cell
When cyanobacteria first evolved photosynthesis (about 2.3 billion years ago), they killed off most life
on earth. What metabolic byproduct of cyanobacteria photosynthesis killed off most of the other
organisms? - correct answer✔✔ Oxygen gas (O2)
Which of the following statements about the bacterial glycocalyx is correct? Lecture 3 Slide 24-25
a. Some bacteria, including Klebsiella pneumoniae, have a highly organized glycocalyx - capsule - that
can function to protect the bacteria from the host immune system.
b. Some bacteria secrete protein via the glycocalyx complex between the inner and outer membrane.
c. Some bacteria utilize the glycocalyx for a type motility known as twitching motility
d. All of the above are correct statements about bacterial glycocalyx. - correct answer✔✔ d. All of the
above are correct statements about bacterial glycocalyx.
What is the fate of the mother cell during bacterial sporulation after the endospore is released? - correct
answer✔✔ The mother cell is sacrificed in order to allow the endospore to escape.
What is the process of bacterial communication by which bacteria are able to determine the number of
proximal microorganisms? - correct answer✔✔ Quorum sensing
Which of the following statements about the central dogma is not correct? Lecture 4 slide 11
a. DNA stores information to direct protein synthesis and passes that information from generation to
generation.
b. RNA is a less stable intermediary that forms a template for protein synthesis.
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