Question 1

The enzymes for cellular respiration in eukaryotic organisms are located within the mitochondria.In prokaryotic organisms,these enzymes are attached to the

Accepted Answer

A)  cell wall.
B)  cell membrane.
C)  ribosomes.
D)  circular DNA.
E)  nuclear membrane.F) A) and B)
G) A) and C)

Question 2

The fungus Penicillium produces a compound that blocks peptidoglycan assembly.Why is a fungus trying to kill bacteria?

Accepted Answer

A)  Fungi eat bacteria.
B)  Fungi and bacteria are both decomposers and compete for resources.
C)  The compound produced by the fungus is used for nitrogen fixation,the antibacterial properties are accidental.
D)  The fungal compound is produced in response to a bacterial invasion of the fungal hyphae.E) B) and C)
F) None of the above

Question 3

If left untreated,syphilis infections go through four stages.The first stage is a sore called a chancre.The signs of the second stage are

Accepted Answer

A)  some nerve damage,loss of some teeth,and perhaps a dimming of color vision.
B)  very few,with many victims having no symptoms.
C)  rash,sore throat,and sores in the mouth
D)  persistence of the chancre and bleeding at the chancre site.
E)  a yellowish-white discharge from the urethra.F) B) and E)
G) A) and B)

Question 4

If the label on a slide reads Gram-positive bacillus,what would a students expect to see?

Accepted Answer

A)  Pink helical cells
B)  Purple rod shaped cells
C)  Red spherical cells
D)  Blue coiled cellsE) A) and B)
F) All of the above

Question 5

Amanda is a microbiologist who studies the pathogenic bacteria Streptococcus pyogenes.In what ways are they (Amanda and the bacteria) similar?

Accepted Answer

A)  Both have cell walls.
B)  Both have linear chromosomes.
C)  Both have mitochondria for ATP production.
D)  Both are capable of sexual reproduction.
E)  Both obtain carbon from consuming organic molecules.F) A) and E)
G) None of the above E

Question 6

You expose a tube of bacteria to ultraviolet radiation to induce mutations.You then spread the bacteria on a plate containing media with all known required nutrients and wait until separate colonies form.Finally,you use replicate plating to transfer a print of this plate to an additional sterile plate containing minimal media plus a known required nutrient for the bacteria.Based on this protocol,colonies growing on the plate with minimal media would include what type of cells?

Accepted Answer

A)  only wild-type bacteria
B)  only mutant bacteria
C)  mutants that only require the supplied nutrient
D)  Both wild-type and all mutants
E)  wild-type bacteria and the mutants that only require the supplied nutrientF) B) and C)
G) All of the above

Question 7

Prokaryotic cell walls consist of a network of polysaccharide molecules connected by cross-bridges of

Accepted Answer

A)  other polysaccharides.
B)  lipids.
C)  peptides.
D)  ribosomes.
E)  chromosomal DNA.F) B) and D)
G) A) and C)

Question 8

The cells wall of bacteria Z contains high concentrations of phospholipids along with proteins and relatively low amounts of lipopolysaccharide.When bacteria Z is gram stained,it will most like be colored?

Accepted Answer

A)  Purple
B)  Pink
C)  Blue
D)  Clear,it does not retain any stainE) C) and D)
F) A) and B)

Question 9

An oil spill occurs,and Greg (a member of the clean up team) suggests adding fertilizer.Why is he making this suggestion?

Accepted Answer

A)  The fertilizer encourages the growth of microbes that can break down the oil.
B)  The chemicals in the fertilizer digest the oil residues.
C)  The fertilizer interacts with the oil droplets and renders them harmless.
D)  The fertilizer volitizes the oil.E) All of the above
F) C) and D)

Question 10

When bacteria are exposed to nutrient-poor conditions,they form thick-walled structures that contain the chromosome and a small amount of cytoplasm.These structures are called

Accepted Answer

A)  plasmids.
B)  pseudomonads.
C)  nucleoids.
D)  endospores.
E)  exospores.F) B) and D)
G) B) and E)

Question 11

Members of the genus ________ are associated with scarlet fever,rheumatic fever,pneumonia,etc.

Accepted Answer

The answer of Members of the genus ________ are associated...

Question 12

Prokaryotes reproduce rapidly and this allows genetic variation to spread quickly through a population.Two processes can create new variations in prokaryotic populations.Select the choice with those two processes.

Accepted Answer

A)  mutation and phage viral attack
B)  phage viral attack and genetic recombination
C)  genetic recombination and nondisjunction
D)  genetic recombination and mutation
E)  genetic recombination and rapid cell divisionF) None of the above
G) A) and D)

Question 13

Genetic diversity in bacteria is created by mutation and ________.

Accepted Answer

recombination

Question 14

Which of the following statements about transformation is false?

Accepted Answer

A)  The bacterium E.coli is incapable of natural transformation.
B)  Like transduction and conjugation,natural transformation is an "accident" of plasmid biology.
C)  Artificial transformation is essential to many recombinant DNA techniques.
D)  All R-plasmids contain antibiotic-resistance genes.
E)  Natural transformation of the Enterobacteriaceae is a significant public health risk.F) D) and E)
G) A) and B)

Question 15

Which of the following events is least likely to result in a genetic change in a bacterium?

Accepted Answer

A)  pilus formation
B)  conjugation
C)  specialized transduction
D)  generalized transduction
E)  natural transformationF) D) and E)
G) A) and D)

Question 16

Which of the following statements about tuberculosis (TB) is false?

Accepted Answer

A)  MDR TB is more expensive to treat.
B)  Not completing a full course of antibiotic can select for MDR strains.
C)  HIV and TB can be transmitted in the same manner.
D)  The spread of TB can be very rapid.
E)  The reservoir of TB is humans and no vector is required for transmission.F) A) and B)
G) B) and E)

Question 17

Archaea differ from Bacteria in all of the following EXCEPT

Accepted Answer

A)  cell wall composition.
B)  plasma membrane make up.
C)  DNA replication.
D)  gene expression.
E)  the presence of a nucleoid region.F) C) and D)
G) A) and C)

Question 18

Genes abc and def have a high average cotransduction frequency.Genes abc and xyz have a very low average cotransduction frequency.What is the best explanation for this difference?

Accepted Answer

A)  The genes abc and def are much closer to each other on the chromosome.
B)  The genes abc and def must share a higher degree of sequence similarity.
C)  Both genes have a high affinity for the viral binding sites.
D)  Both genes code for gene products that are necessary for viral replication.E) A) and B)
F) A) and C) A

Question 19

A microbiologist is conducting a research project on chemolithoautotrophs.This means that the investigator is examining certain aspects of a bacterium that

Accepted Answer

A)  can oxidize inorganic molecules such as ammonia and sulfur for energy.
B)  is a purple nonsulfur bacteria which depends on light.
C)  obtains carbon from organic molecules.
D)  can use the energy from sunlight to build organic molecules from carbon dioxide.
E)  uses light as its energy source and carbon for organic compounds.F) B) and C)
G) A) and E)

Question 20

Farmers often practice crop rotation to help enrich agricultural fields.Why are beans and other legumes often used in the rotations?

Accepted Answer

A)  Beans fix nitrogen.
B)  Bacteria in legume root nodules are nitrifiers.
C)  Legumes enrich the soil by forming heterocysts.
D)  Legumes remove toxins from the soil.
E)  Less carbon dioxide.F) A) and C)
G) B) and E)

Exam 27: Prokaryotes

The enzymes for cellular respiration in eukaryotic organisms are located within the mitochondria.In prokaryotic organisms,these enzymes are attached to the

Correct Answer
verified

The fungus Penicillium produces a compound that blocks peptidoglycan assembly.Why is a fungus trying to kill bacteria?

Correct Answer
verified

If left untreated,syphilis infections go through four stages.The first stage is a sore called a chancre.The signs of the second stage are

Correct Answer
verified

If the label on a slide reads Gram-positive bacillus,what would a students expect to see?

Correct Answer
verified

Amanda is a microbiologist who studies the pathogenic bacteria Streptococcus pyogenes.In what ways are they (Amanda and the bacteria) similar?

Correct Answer
verified
E

Correct Answer
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Prokaryotic cell walls consist of a network of polysaccharide molecules connected by cross-bridges of

Correct Answer
verified

The cells wall of bacteria Z contains high concentrations of phospholipids along with proteins and relatively low amounts of lipopolysaccharide.When bacteria Z is gram stained,it will most like be colored?

Correct Answer
verified

An oil spill occurs,and Greg (a member of the clean up team) suggests adding fertilizer.Why is he making this suggestion?

Correct Answer
verified

When bacteria are exposed to nutrient-poor conditions,they form thick-walled structures that contain the chromosome and a small amount of cytoplasm.These structures are called

Correct Answer
verified

Members of the genus ________ are associated with scarlet fever,rheumatic fever,pneumonia,etc.

Correct Answer
verified

Prokaryotes reproduce rapidly and this allows genetic variation to spread quickly through a population.Two processes can create new variations in prokaryotic populations.Select the choice with those two processes.

Correct Answer
verified

Genetic diversity in bacteria is created by mutation and ________.

Correct Answer
verified
recombination

Which of the following statements about transformation is false?

Correct Answer
verified

Which of the following events is least likely to result in a genetic change in a bacterium?

Correct Answer
verified

Which of the following statements about tuberculosis (TB) is false?

Correct Answer
verified

Archaea differ from Bacteria in all of the following EXCEPT

Correct Answer
verified

Genes abc and def have a high average cotransduction frequency.Genes abc and xyz have a very low average cotransduction frequency.What is the best explanation for this difference?

Correct Answer
verified
A

A microbiologist is conducting a research project on chemolithoautotrophs.This means that the investigator is examining certain aspects of a bacterium that

Correct Answer
verified

Farmers often practice crop rotation to help enrich agricultural fields.Why are beans and other legumes often used in the rotations?

Correct Answer
verified

Exam 27: Prokaryotes

The enzymes for cellular respiration in eukaryotic organisms are located within the mitochondria.In prokaryotic organisms,these enzymes are attached to the

Correct AnswerverifiedShow Answer

The fungus Penicillium produces a compound that blocks peptidoglycan assembly.Why is a fungus trying to kill bacteria?

Correct AnswerverifiedShow Answer

If left untreated,syphilis infections go through four stages.The first stage is a sore called a chancre.The signs of the second stage are

Correct AnswerverifiedShow Answer

If the label on a slide reads Gram-positive bacillus,what would a students expect to see?

Correct AnswerverifiedShow Answer

Amanda is a microbiologist who studies the pathogenic bacteria Streptococcus pyogenes.In what ways are they (Amanda and the bacteria) similar?

Correct AnswerverifiedE

Correct AnswerverifiedShow Answer

Prokaryotic cell walls consist of a network of polysaccharide molecules connected by cross-bridges of

Correct AnswerverifiedShow Answer

The cells wall of bacteria Z contains high concentrations of phospholipids along with proteins and relatively low amounts of lipopolysaccharide.When bacteria Z is gram stained,it will most like be colored?

Correct AnswerverifiedShow Answer

An oil spill occurs,and Greg (a member of the clean up team) suggests adding fertilizer.Why is he making this suggestion?

Correct AnswerverifiedShow Answer

When bacteria are exposed to nutrient-poor conditions,they form thick-walled structures that contain the chromosome and a small amount of cytoplasm.These structures are called

Correct AnswerverifiedShow Answer

Members of the genus ________ are associated with scarlet fever,rheumatic fever,pneumonia,etc.

Correct AnswerverifiedShow Answer

Prokaryotes reproduce rapidly and this allows genetic variation to spread quickly through a population.Two processes can create new variations in prokaryotic populations.Select the choice with those two processes.

Correct AnswerverifiedShow Answer

Genetic diversity in bacteria is created by mutation and ________.

Correct Answerverifiedrecombination

Which of the following statements about transformation is false?

Correct AnswerverifiedShow Answer

Which of the following events is least likely to result in a genetic change in a bacterium?

Correct AnswerverifiedShow Answer

Which of the following statements about tuberculosis (TB) is false?

Correct AnswerverifiedShow Answer

Archaea differ from Bacteria in all of the following EXCEPT

Correct AnswerverifiedShow Answer

Genes abc and def have a high average cotransduction frequency.Genes abc and xyz have a very low average cotransduction frequency.What is the best explanation for this difference?

Correct AnswerverifiedA

A microbiologist is conducting a research project on chemolithoautotrophs.This means that the investigator is examining certain aspects of a bacterium that

Correct AnswerverifiedShow Answer

Farmers often practice crop rotation to help enrich agricultural fields.Why are beans and other legumes often used in the rotations?

Correct AnswerverifiedShow Answer

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E

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recombination

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A

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