Question 1

Which of the following statements best describes secondary endosymbiosis?

Accepted Answer

A)  A host cell manufactures its own symbiont and later acquires another one by phagocytosis.
B)  A host cell ingests another cell already containing a primary symbiont.
C)  A host cell ingests two or more symbionts simultaneously.
D)  A host cell ingests one symbiont and then later ingests another one.
E)  A host cell without plastids ingests a prokaryotic cell.F) C) and D)
G) B) and E)

Question 2

Fungus-like protists are more related to true fungi in the supergroup Opisthokonta than they are to members of any other supergroup.

Accepted Answer

A) True 
 B)False

Question 3

You have discovered a new species of bacteria.Its characteristics include a thick peptidoglycan layer and the ability to produce antibiotics.What do you think is true about this species?

Accepted Answer

A)  They are Gram-negative and are likely to form spores.
B)  They are Gram-positive and have a lipopolysaccharide-rich outer envelope.
C)  They are likely to be Gram-positive Actinobacteria.
D)  They are likely to be Gram-negative Actinobacteria.E) None of the above
F) A) and D) C

Question 4

Bird influenza is an emerging disease.If you were given the task of using Koch's postulates of finding the pathogen causing bird flu,what sequence of procedures should you use?

Accepted Answer

A)  (1) Inoculate a healthy bird with the suspected pathogen to see whether it becomes sick,(2) compare symptoms of that bird with those of a bird known to have the disease,(3) isolate the pathogen from both birds in pure culture and stain them to see whether they are both Gram-positive,and (4) make a vaccine from the pure culture of one bird and inject it into another to see if it recovers.
B)  (1) Take blood samples from a sick bird,(2) isolate the pathogen in pure culture,(3) treat the bird for the disease and when it recovers take a second blood sample,and (4) test the blood to check whether it no longer contains the pathogen.
C)  (1) Inject a bird with the suspected pathogen,(2) inject another bird with a control that doesn't contain the suspected pathogen,(3) repeat with more birds,and (4) plate out samples of blood from both kinds of birds to see if you can isolate the pathogen in pure culture.
D)  (1) Isolate in pure culture the suspected pathogen from sick birds,then (2) use a series of medications to treat the sick birds,(3) select the medication that worked best,(4) apply that medication to pure cultures of the pathogen,and (5) see whether it kills the pathogen,compared to control treatments without the medication.
E)  (1) Check whether the suspected pathogen is present in sick birds,then (2) isolate the pathogen from an infected bird and grow it in pure culture,(3) inoculate cells from pure culture into a healthy bird to see whether it causes the disease,and (4) attempt to isolate the suspected pathogen from the inoculated bird.F) B) and E)
G) A) and B)

Question 5

Slime molds are in the supergroup

Accepted Answer

A)  Opisthokonta
B)  Rhizaria
C)  Amoebozoa
D)  Stramenopila
E)  AlveolataF) A) and E)
G) B) and D)

Question 6

The symptoms of malaria are

Accepted Answer

A)  jaundice
B)  abdominal cramps
C)  diarrhea and dehydration
D)  headaches and nausea
E)  alternating chills and feverF) A) and C)
G) All of the above

Question 7

Phagocytosis is:

Accepted Answer

A)  the movement of small organic molecules across the cell membrane.
B)  the capture and ingestion of food particles by a cell.
C)  the synthesis of organic molecules from inorganic molecules using light as an energy source.
D)  the ability to use photosynthesis and osmosis or particle ingestion for nutrition.E) A) and B)
F) All of the above

Question 8

The human microbiome is:

Accepted Answer

A)  the collection of pathogenic microbes that attack humans and cause disease
B)  the collection of symbiotic microbes living on or within the human body,often performing functions that humans do not possess
C)  the collection of microbes that benefit human society,providing services such as bioremediation and assisting in food production
D)  the collection of microbes that share the same environmental requirements as humans
E)  the collection of microbes that are necessary for human survival,such as photoautotrophs and nitrogen fixing bacteriaF) A) and B)
G) C) and D)

Question 9

Archaea,Bacteria,and Eukarya are:

Accepted Answer

A)  phyla
B)  kingdoms
C)  families
D)  domains
E)  ordersF) B) and D)
G) A) and C) D

Question 10

The collars on the cells of choanoflagellates have the function of:

Accepted Answer

A)  protecting the flagellum
B)  filtering bacterial food from the water
C)  directing currents away from the flagellum
D)  storing waste materials of the cell
E)  attaching to the substrateF) B) and C)
G) A) and E)

Question 11

Plants share a most recent common ancestor with what group of protists?

Accepted Answer

A)  green algae
B)  red algae
C)  brown algae
D)  cyanobacteria
E)  dinoflagellatesF) A) and B)
G) D) and E)

Question 12

Nitrogenase is the enzyme that is responsible for nitrogen fixation.In cyanobacteria,where is this enzyme likely to carry out nitrogen fixation?

Accepted Answer

A)  Nucleus
B)  Heterocyte
C)  Plastid
D)  AkineteE) A) and B)
F) A) and C)

Question 13

Which of the following diseases is NOT caused by endospore-forming bacteria?

Accepted Answer

A)  Strep throat
B)  botulism
C)  anthrax
D)  tetanus
E)  lockjawF) B) and E)
G) D) and E)

Question 14

An environmental testing laboratory is unable to identify a single-celled organism isolated from a well water sample.Inspection of the microorganism with a compound microscope reveals that it uses pseudopodia for movement and is not enclosed within a mineral shell.Based on this information,this organism can be classified to which supergroup?

Accepted Answer

A)  Opisthokonta
B)  Alveolata
C)  Amoebozoa
D)  Rhizaria
E)  ExcavataF) None of the above
G) B) and C) C

Question 15

Which of the following is NOT true of horizontal gene transfer?

Accepted Answer

A)  It occurs when genes are transferred from parent to progeny.
B)  It increases genetic diversity for a species.
C)  It has important implications for inferring phylogeny.
D)  It can occur through endosymbiosis.
E)  It occurs commonly in bacteria.F) C) and D)
G) A) and C)

Question 16

Some algae are more closely related to plants than they are to other algae.

Accepted Answer

A) True 
 B)False

Question 17

Plasmodium falciparum sporozoites produce merozoites in the human

Accepted Answer

A)  blood
B)  brain
C)  lymph glands
D)  liver
E)  spleenF) B) and D)
G) A) and D)

Question 18

Stramenopiles are unique in that they possess:

Accepted Answer

A)  double plastids
B)  hairy flagella
C)  alveoli
D)  flexible protein ribbons beneath the plasma membrane
E)  calcium carbonate crystalsF) B) and C)
G) B) and D)

Question 19

Cyanobacteria,or blue-green algae,are considered the most ancient organisms capable of photosynthesis.Given what you know about cyanobacteria,which of the following is the more similar species?

Accepted Answer

A)  Rickettsia rickettsii;A unicellular intracellular pathogen that infects warm-blooded animals,including humans,causing Rocky Mountain spotted fever.
B)  Halobacterium salinarum;A unicellular obligate aerobe that often inhabits hypersaline lakes.This species produces gas vesicles in order to maximize its access to oxygen at the lake's surface.
C)  Nitrosolobus multiformis;A unicellular rod-shaped nitrifying bacterium that inhabits subsurface soils at depths associated with plant roots.
D)  Nostoc verrucosum;A filamentous species often found in shallow streams and creeks that is capable of fixing atmospheric nitrogen using specialized cells known as heterocytes.E) B) and D)
F) C) and D)

Question 20

A pharmaceutical company develops a drug inhibiting mitosis of sporozoites in an effort to prevent malaria.How would this affect the next step of the infection cycle of Plasmodium falciparum?

Accepted Answer

A)  Merozoites would not be produced.
B)  Gametocytes would not be produced.
C)  Gametes would not be produced.
D)  Infected red blood cells would not attach to the linings of capillaries.
E)  Infected red blood cells would not burst.F) C) and D)
G) C) and E)

Exam 22: Microorganisms: The Archaea, Bacteria, and Protists

Which of the following statements best describes secondary endosymbiosis?

Correct Answer
verified

Fungus-like protists are more related to true fungi in the supergroup Opisthokonta than they are to members of any other supergroup.

Correct Answer
verified

You have discovered a new species of bacteria.Its characteristics include a thick peptidoglycan layer and the ability to produce antibiotics.What do you think is true about this species?

Correct Answer
verified
C

Bird influenza is an emerging disease.If you were given the task of using Koch's postulates of finding the pathogen causing bird flu,what sequence of procedures should you use?

Correct Answer
verified

Slime molds are in the supergroup

Correct Answer
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The symptoms of malaria are

Correct Answer
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Phagocytosis is:

Correct Answer
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The human microbiome is:

Correct Answer
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Archaea,Bacteria,and Eukarya are:

Correct Answer
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D

The collars on the cells of choanoflagellates have the function of:

Correct Answer
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Plants share a most recent common ancestor with what group of protists?

Correct Answer
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Nitrogenase is the enzyme that is responsible for nitrogen fixation.In cyanobacteria,where is this enzyme likely to carry out nitrogen fixation?

Correct Answer
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Which of the following diseases is NOT caused by endospore-forming bacteria?

Correct Answer
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Correct Answer
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C

Which of the following is NOT true of horizontal gene transfer?

Correct Answer
verified

Some algae are more closely related to plants than they are to other algae.

Correct Answer
verified

Plasmodium falciparum sporozoites produce merozoites in the human

Correct Answer
verified

Stramenopiles are unique in that they possess:

Correct Answer
verified

Cyanobacteria,or blue-green algae,are considered the most ancient organisms capable of photosynthesis.Given what you know about cyanobacteria,which of the following is the more similar species?

Correct Answer
verified

A pharmaceutical company develops a drug inhibiting mitosis of sporozoites in an effort to prevent malaria.How would this affect the next step of the infection cycle of Plasmodium falciparum?

Correct Answer
verified

Exam 22: Microorganisms: The Archaea, Bacteria, and Protists

Which of the following statements best describes secondary endosymbiosis?

Correct AnswerverifiedShow Answer

Fungus-like protists are more related to true fungi in the supergroup Opisthokonta than they are to members of any other supergroup.

Correct AnswerverifiedShow Answer

You have discovered a new species of bacteria.Its characteristics include a thick peptidoglycan layer and the ability to produce antibiotics.What do you think is true about this species?

Correct AnswerverifiedC

Bird influenza is an emerging disease.If you were given the task of using Koch's postulates of finding the pathogen causing bird flu,what sequence of procedures should you use?

Correct AnswerverifiedShow Answer

Slime molds are in the supergroup

Correct AnswerverifiedShow Answer

The symptoms of malaria are

Correct AnswerverifiedShow Answer

Phagocytosis is:

Correct AnswerverifiedShow Answer

The human microbiome is:

Correct AnswerverifiedShow Answer

Archaea,Bacteria,and Eukarya are:

Correct AnswerverifiedD

The collars on the cells of choanoflagellates have the function of:

Correct AnswerverifiedShow Answer

Plants share a most recent common ancestor with what group of protists?

Correct AnswerverifiedShow Answer

Nitrogenase is the enzyme that is responsible for nitrogen fixation.In cyanobacteria,where is this enzyme likely to carry out nitrogen fixation?

Correct AnswerverifiedShow Answer

Which of the following diseases is NOT caused by endospore-forming bacteria?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedC

Which of the following is NOT true of horizontal gene transfer?

Correct AnswerverifiedShow Answer

Some algae are more closely related to plants than they are to other algae.

Correct AnswerverifiedShow Answer

Plasmodium falciparum sporozoites produce merozoites in the human

Correct AnswerverifiedShow Answer

Stramenopiles are unique in that they possess:

Correct AnswerverifiedShow Answer

Cyanobacteria,or blue-green algae,are considered the most ancient organisms capable of photosynthesis.Given what you know about cyanobacteria,which of the following is the more similar species?

Correct AnswerverifiedShow Answer

A pharmaceutical company develops a drug inhibiting mitosis of sporozoites in an effort to prevent malaria.How would this affect the next step of the infection cycle of Plasmodium falciparum?

Correct AnswerverifiedShow Answer

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C

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D

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C

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