Question 1

Some prokaryotes attach to other substrates by hairlike outgrowths,which are shorter than flagella.These are called

Accepted Answer

A)  endospores.
B)  flagellin.
C)  pili.
D)  plasmids.
E)  fission products.F) A) and B)
G) A) and C)

Question 2

Which of the following statements about Hfr cells and bacterial conjugation is false?

Accepted Answer

A)  An Hfr cell becomes an F- cell if its integrated F plasmid is excised.
B)  If excision of the F plasmid from an Hfr cell includes some bacterial genes,a partial diploid can result.
C)  The genes that are transferred from an Hfr cell into a recipient cell during conjugation replace the equivalent genes in the recipient cell.
D)  An F' plasmid contains some bacterial genes.
E)  Cells with integrated F' plasmid have two copies of some genes.F) A) and D)
G) A) and C)

Question 3

The prokaryotic DNA is located in the

Accepted Answer

A)  capsid region.
B)  nucleoid region.
C)  endospore region.
D)  peptidoglycan region.
E)  pili region.F) A) and B)
G) A) and E)

Question 4

Prokaryotes undergo a process that produces cells that are identical.This process is called

Accepted Answer

A)  mitosis.
B)  meiosis.
C)  conjugation.
D)  binary fission.
E)  syngamy.F) All of the above
G) B) and E)

Question 5

Bacteria typically use binary fission,but under special circumstances sexual reproduction is possible via horizontal gene transfer.

Accepted Answer

A) True 
 B)False

Question 6

Prokaryotes split into two lines early in the history of life.The differences are so fundamental that they are assigned to two different domains,the ________ and the Bacteria.

Accepted Answer

The answer of Prokaryotes split into two lines early in...

Question 7

Tuberculosis remains a serious worldwide health problem due to all of the following except

Accepted Answer

A)  multi-drug resistance.
B)  social factors such as crowding and incarceration.
C)  the prevalence of HIV infections.
D)  ease of transmission.
E)  absence of MDR strains.F) A) and C)
G) B) and E)

Question 8

Why is chlamydia much more common than syphilis?

Accepted Answer

A)  Chlamydia is spread via droplet inhalation.
B)  Syphilis can penetrate a condom whereas chlamydia cannot.
C)  Many chlamydia infections are asymptomatic.
D)  Chlamydia is viral,and viral diseases spread much quicker.
E)  Chlamydia is resistant to most antibiotics.F) A) and B)
G) All of the above

Question 9

Why are children often told that if they eat too much candy their teeth will fall out?

Accepted Answer

A)  Sugar attacks tooth enamel.
B)  Sugars gradually replace the tooth enamel.
C)  Bacteria use the sugar to make ATP.This fermentation process produces acids as a by-product.
D)  Bacteria secrete acids in order to digest the sugar molecules.E) None of the above
F) B) and C)

Question 10

Vibrio cholerae produces a toxin that destroys the intestinal epithelium.This leads to massive diarrhea; the diarrhea can kill the human via dehydration but helps the bacteria spread and colonize other humans.What is this relationship?

Accepted Answer

A)  Mutualistic
B)  Commensalistic
C)  Symbiotic
D)  AtavisticE) B) and C)
F) A) and D)

Question 11

Which of the following is not a shape seen in prokaryotes?

Accepted Answer

A)  Spheres
B)  Rods
C)  Spirals
D)  IcosahedralsE) A) and B)
F) All of the above

Question 12

Current classification of prokaryotes is based on

Accepted Answer

A)  morphology of flagella.
B)  sequencing of proteins,DNA,and RNA.
C)  occurrence of transverse binary fission.
D)  type of colony formation.
E)  ability to stain the cell wall with Gram stain.F) B) and E)
G) A) and C)

Question 13

Bacterial ribosomes differ from eukaryotic ribosomes in all of the following except

Accepted Answer

A)  they act as sites of protein synthesis.
B)  they are smaller than in eukaryotes.
C)  tetracycline and chloramphenicol can bind to bacterial ribosomes.
D)  they differ in ribosomal proteins.
E)  they differ in RNA content.F) D) and E)
G) A) and E)

Question 14

Certain prokaryotes can withstand drying and hotter temperatures because of their ability to form

Accepted Answer

A)  cell walls.
B)  endospores.
C)  flagella.
D)  organelles.
E)  plasmids.F) A) and D)
G) A) and C)

Question 15

The data below shows recombination of genes (1-5) according to the amount of time available for transfer of the bacterial chromosome during conjugation between different genetic strains in E coli.Based on these data,which gene is closest to gene 1? (Note: The entire chromosome is transferred in 100 minutes.)

Accepted Answer

A)  gene 2
B)  gene 3
C)  gene 4
D)  gene 5E) A) and D)
F) All of the above

Question 16

Carbon fixation carried out by the prokaryotes known as the ________ involves chlorophyll a.

Accepted Answer

The answer of Carbon fixation carried out by the prokaryotes...

Question 17

A bacterium is found that can photosynthesize in the presence of light but uses hydrogen sulfide and releases elemental sulfur as a by-product.This organism can best be classified as a

Accepted Answer

A)  chemolithoautotroph.
B)  chemoheterotroph.
C)  photoautotroph.
D)  photoheterotroph.
E)  pathogen.F) A) and B)
G) B) and E)

Question 18

Bacteria cause all of the following human diseases except

Accepted Answer

A)  cholera.
B)  diphtheria.
C)  tuberculosis.
D)  tetanus.
E)  malaria.F) A) and B)
G) A) and C)

Question 19

Which of the following statements about sexually transmitted diseases (STDs) is false?

Accepted Answer

A)  Gonorrhea,syphilis,and chlamydia are all transmitted through sexual contact.
B)  Because chlamydia has both bacterial and viral characteristics,it cannot be treated with antibiotics.
C)  Chlamydia is known as the "silent STD."
D)  The incidence of chlamydia has increased as gonorrhea has decreased.
E)  Syphilis can be transmitted from a mother to her fetus.F) A) and C)
G) None of the above

Question 20

Early classification systems of the bacteria employed all of the following characteristics except

Accepted Answer

A)  the ability to photosynthesize.
B)  rRNA sequences.
C)  motility.
D)  colony or filament forming.
E)  sporulation or binary fission.F) B) and D)
G) D) and E)

Exam 27: Prokaryotes

Early classification systems of the bacteria employed all of the following characteristics except

Correct Answer
verified

Which of the following is not a shape seen in prokaryotes?

Correct Answer
verified

Which of the following statements about sexually transmitted diseases (STDs) is false?

Correct Answer
verified

Why are children often told that if they eat too much candy their teeth will fall out?

Correct Answer
verified

Vibrio cholerae produces a toxin that destroys the intestinal epithelium.This leads to massive diarrhea; the diarrhea can kill the human via dehydration but helps the bacteria spread and colonize other humans.What is this relationship?

Correct Answer
verified

A bacterium is found that can photosynthesize in the presence of light but uses hydrogen sulfide and releases elemental sulfur as a by-product.This organism can best be classified as a

Correct Answer
verified

Bacterial ribosomes differ from eukaryotic ribosomes in all of the following except

Correct Answer
verified

Carbon fixation carried out by the prokaryotes known as the ________ involves chlorophyll a.

Correct Answer
verified

The prokaryotic DNA is located in the

Correct Answer
verified

Why is chlamydia much more common than syphilis?

Correct Answer
verified

Bacteria typically use binary fission,but under special circumstances sexual reproduction is possible via horizontal gene transfer.

Correct Answer
verified

Which of the following statements about Hfr cells and bacterial conjugation is false?

Correct Answer
verified

Prokaryotes undergo a process that produces cells that are identical.This process is called

Correct Answer
verified

Correct Answer
verified

Bacteria cause all of the following human diseases except

Correct Answer
verified

Some prokaryotes attach to other substrates by hairlike outgrowths,which are shorter than flagella.These are called

Correct Answer
verified

Prokaryotes split into two lines early in the history of life.The differences are so fundamental that they are assigned to two different domains,the ________ and the Bacteria.

Correct Answer
verified

Current classification of prokaryotes is based on

Correct Answer
verified

Certain prokaryotes can withstand drying and hotter temperatures because of their ability to form

Correct Answer
verified

Tuberculosis remains a serious worldwide health problem due to all of the following except

Correct Answer
verified

Exam 27: Prokaryotes

Early classification systems of the bacteria employed all of the following characteristics except

Correct AnswerverifiedShow Answer

Which of the following is not a shape seen in prokaryotes?

Correct AnswerverifiedShow Answer

Which of the following statements about sexually transmitted diseases (STDs) is false?

Correct AnswerverifiedShow Answer

Why are children often told that if they eat too much candy their teeth will fall out?

Correct AnswerverifiedShow Answer

Vibrio cholerae produces a toxin that destroys the intestinal epithelium.This leads to massive diarrhea; the diarrhea can kill the human via dehydration but helps the bacteria spread and colonize other humans.What is this relationship?

Correct AnswerverifiedShow Answer

A bacterium is found that can photosynthesize in the presence of light but uses hydrogen sulfide and releases elemental sulfur as a by-product.This organism can best be classified as a

Correct AnswerverifiedShow Answer

Bacterial ribosomes differ from eukaryotic ribosomes in all of the following except

Correct AnswerverifiedShow Answer

Carbon fixation carried out by the prokaryotes known as the ________ involves chlorophyll a.

Correct AnswerverifiedShow Answer

The prokaryotic DNA is located in the

Correct AnswerverifiedShow Answer

Why is chlamydia much more common than syphilis?

Correct AnswerverifiedShow Answer

Bacteria typically use binary fission,but under special circumstances sexual reproduction is possible via horizontal gene transfer.

Correct AnswerverifiedShow Answer

Which of the following statements about Hfr cells and bacterial conjugation is false?

Correct AnswerverifiedShow Answer

Prokaryotes undergo a process that produces cells that are identical.This process is called

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Bacteria cause all of the following human diseases except

Correct AnswerverifiedShow Answer

Some prokaryotes attach to other substrates by hairlike outgrowths,which are shorter than flagella.These are called

Correct AnswerverifiedShow Answer

Prokaryotes split into two lines early in the history of life.The differences are so fundamental that they are assigned to two different domains,the ________ and the Bacteria.

Correct AnswerverifiedShow Answer

Current classification of prokaryotes is based on

Correct AnswerverifiedShow Answer

Certain prokaryotes can withstand drying and hotter temperatures because of their ability to form

Correct AnswerverifiedShow Answer

Tuberculosis remains a serious worldwide health problem due to all of the following except

Correct AnswerverifiedShow Answer

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