MIC 205 Final Exam Arizona State University-Downtown
Phoenix With complete solu$on RATED A+ NEW
EDITION
Which of the following bacterial species are capable of conver ng nitrogen gas in the
atmosphere into compounds that other organisms can be er u lize? - Ans Rhizobium spp. :
gram -, fix nitrogen
Of the bacterial species listed below, which do not u lize type IV secre on to transfer DNA or
proteins into eukaryo c cells? - Ans Neisseria gonorrhoeae Type V secre on
A+er gradua ng 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 a ract 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? - Ans (Alii)Vibrio fischeri - Aliivibrio
fisheri; produce visible light at high bacterial concentra ons.
Hans Chris an Gram is famous for developing a staining technique that separates pathogenic
bacteria into two roughly equal sized groups. He originally developed this technique to
differen ate 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? - Ans Klebsiella pneumoniae :
bacillus
The one thing you learned by your summer at sea (ques on #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 rota on you will be learning under the tutelage of Dr. Yavan
Knowsomuch. On the first day with her, Dr. Knowsomuch o:andedly remarks that her pa ents
keep developing coli s a+er they are discharged from her care. What species of bacteria do you
,suspect is causing these symptoms? - Ans Clostridium difficile :coli s is a chronic, inflammatory
bowel disease
Robert Koch was one of the scien sts in the late 19th century involved in developing the Germ
Theory. This theory states that diseases are caused by microscopic organisms. Dr. Koch's las ng
contribu on to this theory was a systema c approach for iden fying the microbial cause of a
disease. We call this approach Koch's Postulates. What were the declara ve statements? - Ans
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. - Ans False: Not known, only a method to prove what causes disease. Not all diseases
are microbial in origin; example: gene c diseases.
Which scien st is remembered for having developed the first microscope that could resolve
microorganisms? Lecture - Ans Dr. Antonie van Leeuwenhoek: compound microscope
Which domain of life contains microorganisms - Ans a. Eubacteria
b. Eukaryotes
c. Archaea
True or False - The human body contains 10 mes more prokaryo c cells than eukaryo c cells. -
Ans True: We have more microorganisms on our bodies than our own cells.
Clostridium botulinum is a Gram-posi ve spore-forming bacterium that produces a toxin that
can block the release of neurotransmi ers 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 - Ans e. Botox will not prevent or treat
any of these diseases
I am sure you took the me to study osmosis. Here is your chance to be rewarded. What would
happen to a bacterial cell if you placed it in an isotonic solu on? - Ans Nothing would happen
to the bacterial cell. because of cell wall
Which of the following statements best characterizes the role of ATP in ac ve transport? - Ans
ATP hydrolysis generates the energy to move a compound from a low concentra on outside the
cell into the high concentra on 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? - Ans 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 func on 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 u lize the glycocalyx for a type mo lity known as twitching mo lity
, d. All of the above are correct statements about bacterial glycocalyx. - Ans d. All of the above
are correct statements about bacterial glycocalyx.
What is the fate of the mother cell during bacterial sporula on a+er the endospore is released?
- Ans The mother cell is sacrificed in order to allow the endospore to escape.
What is the process of bacterial communica on by which bacteria are able to determine the
number of proximal microorganisms? - Ans Quorum sensing
Which of the following statements about the central dogma is not correct? Lecture 4 slide 11
a. DNA stores informa on to direct protein synthesis and passes that informa on from
genera on to genera on.
b. RNA is a less stable intermediary that forms a template for protein synthesis.
c. Ribosomes synthesize proteins by polymerizing amino acids in an order determined by an
RNA template
d. RNA polymerase creates a complementary sequence of RNA from a DNA template.
e. All of the above are correct. - Ans e. All of the above are correct.
Which of the following characteris cs of amino acids influence how proteins fold? Lecture 4
slide 15
a. Amino acids with similar hydrophobicity interact with each other.
b. Amino acids with like charges repel each other.
c. Amino acids with opposite charges a ract each other.
d. All of the above are likely to play a role in how proteins fold. - Ans d. All of the above are
likely to play a role in how proteins fold.
Phoenix With complete solu$on RATED A+ NEW
EDITION
Which of the following bacterial species are capable of conver ng nitrogen gas in the
atmosphere into compounds that other organisms can be er u lize? - Ans Rhizobium spp. :
gram -, fix nitrogen
Of the bacterial species listed below, which do not u lize type IV secre on to transfer DNA or
proteins into eukaryo c cells? - Ans Neisseria gonorrhoeae Type V secre on
A+er gradua ng 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 a ract 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? - Ans (Alii)Vibrio fischeri - Aliivibrio
fisheri; produce visible light at high bacterial concentra ons.
Hans Chris an Gram is famous for developing a staining technique that separates pathogenic
bacteria into two roughly equal sized groups. He originally developed this technique to
differen ate 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? - Ans Klebsiella pneumoniae :
bacillus
The one thing you learned by your summer at sea (ques on #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 rota on you will be learning under the tutelage of Dr. Yavan
Knowsomuch. On the first day with her, Dr. Knowsomuch o:andedly remarks that her pa ents
keep developing coli s a+er they are discharged from her care. What species of bacteria do you
,suspect is causing these symptoms? - Ans Clostridium difficile :coli s is a chronic, inflammatory
bowel disease
Robert Koch was one of the scien sts in the late 19th century involved in developing the Germ
Theory. This theory states that diseases are caused by microscopic organisms. Dr. Koch's las ng
contribu on to this theory was a systema c approach for iden fying the microbial cause of a
disease. We call this approach Koch's Postulates. What were the declara ve statements? - Ans
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. - Ans False: Not known, only a method to prove what causes disease. Not all diseases
are microbial in origin; example: gene c diseases.
Which scien st is remembered for having developed the first microscope that could resolve
microorganisms? Lecture - Ans Dr. Antonie van Leeuwenhoek: compound microscope
Which domain of life contains microorganisms - Ans a. Eubacteria
b. Eukaryotes
c. Archaea
True or False - The human body contains 10 mes more prokaryo c cells than eukaryo c cells. -
Ans True: We have more microorganisms on our bodies than our own cells.
Clostridium botulinum is a Gram-posi ve spore-forming bacterium that produces a toxin that
can block the release of neurotransmi ers 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 - Ans e. Botox will not prevent or treat
any of these diseases
I am sure you took the me to study osmosis. Here is your chance to be rewarded. What would
happen to a bacterial cell if you placed it in an isotonic solu on? - Ans Nothing would happen
to the bacterial cell. because of cell wall
Which of the following statements best characterizes the role of ATP in ac ve transport? - Ans
ATP hydrolysis generates the energy to move a compound from a low concentra on outside the
cell into the high concentra on 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? - Ans 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 func on 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 u lize the glycocalyx for a type mo lity known as twitching mo lity
, d. All of the above are correct statements about bacterial glycocalyx. - Ans d. All of the above
are correct statements about bacterial glycocalyx.
What is the fate of the mother cell during bacterial sporula on a+er the endospore is released?
- Ans The mother cell is sacrificed in order to allow the endospore to escape.
What is the process of bacterial communica on by which bacteria are able to determine the
number of proximal microorganisms? - Ans Quorum sensing
Which of the following statements about the central dogma is not correct? Lecture 4 slide 11
a. DNA stores informa on to direct protein synthesis and passes that informa on from
genera on to genera on.
b. RNA is a less stable intermediary that forms a template for protein synthesis.
c. Ribosomes synthesize proteins by polymerizing amino acids in an order determined by an
RNA template
d. RNA polymerase creates a complementary sequence of RNA from a DNA template.
e. All of the above are correct. - Ans e. All of the above are correct.
Which of the following characteris cs of amino acids influence how proteins fold? Lecture 4
slide 15
a. Amino acids with similar hydrophobicity interact with each other.
b. Amino acids with like charges repel each other.
c. Amino acids with opposite charges a ract each other.
d. All of the above are likely to play a role in how proteins fold. - Ans d. All of the above are
likely to play a role in how proteins fold.
