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) A) and B)
F) B) and D)

Question 2

Prokaryotes that harvest both energy and carbon atoms from organic molecules are called

Accepted Answer

A)  photoautotrophs.
B)  chemolithoautotrophs.
C)  photoheterotrophs.
D)  chemoheterotrophs.E) A) and D)
F) A) and C)

Question 3

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) A) and B)
F) A) and C)

Question 4

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) B) and C)
F) A) and D) C

Question 5

Cell walls of bacteria (domain Bacteria) usually consist of _____________, a network of polysaccharide molecules connected by polypeptide cross-links.

Accepted Answer

The answer of Cell walls of bacteria (domain Bacteria) usually...

Question 6

Many cells of the immune system have receptors that detect peptidoglycans and lipopolysaccharides.How do pathogenic bacteria avoid detection?

Accepted Answer

A)  Pathogenic bacteria lack cell walls.
B)  Pathogens often encase themselves in a gelatinous capsule.
C)  Peptidoglycans are absent from pathogenic bacteria.
D)  Disease is only possible if the immune system has been compromised by some other event.E) A) and C)
F) None of the above

Question 7

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

Accepted Answer

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

Question 8

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) None of the above
F) B) and D)

Question 9

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) B) and D)
F) B) and C) A

Question 10

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) A) and C)

Question 11

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 12

Bacterial sexually transmitted diseases include all of the following except

Accepted Answer

A)  gonorrhea.
B)  syphilis.
C)  chlamydia.
D)  herpes.E) C) and D)
F) B) and D)

Question 13

Are transformation and transduction the same process?

Accepted Answer

A)  Yes; they both involve the acquisition of viral genes.
B)  No; only transformation passes on genes for pathogenicity.
C)  Yes; both processes transfer specific gene products to a specific bacterium.
D)  No; although both involve gene transfer the sources of the genetic material differ.E) C) and D)
F) None of the above

Question 14

A microbiologist explains to one of her biology classes that her research focuses on the nucleoid region of the cholera bacteria.This means that she is studying a region within the bacterium that contains the

Accepted Answer

A)  nucleic acids.
B)  nuclear membrane.
C)  R plasmids.
D)  peptidoglycan.E) None of the above
F) A) and B)

Question 15

Prokaryotes are very important ecologically because of their involvement in all of the following except

Accepted Answer

A)  photosynthesis.
B)  nitrogen fixation.
C)  STDs.
D)  denitrification.E) None of the above
F) All of the above C

Question 16

A researcher observed a reduction in the number of chromosomes during cell division for a microbe, he concludes that the microbe must be

Accepted Answer

A)  Eukaryotic
B)  Prokaryotic
C)  An archaean
D)  a virusE) All of the above
F) B) and D)

Question 17

Plasmids are distinguished from bacterial chromosomes in that

Accepted Answer

A)  plasmids are circular, bacterial chromosomes are linear.
B)  plasmids occur in the cytoplasm, bacterial chromosomes occur in the nucleus.
C)  plasmids are composed of RNA, bacterial chromosomes are composed of DNA.
D)  plasmids have few genes, bacterial chromosomes have many genes.E) None of the above
F) A) and B)

Question 18

Phil has chronic ulcers, he has been taking acid blockers and drinking vast amounts of liquid antacids.These help relieve the symptoms but he still suffers from ulcers.What would be the best course of action to treat the source of his ulcers?

Accepted Answer

A)  Taking several different antacids.
B)  Increasing the dosage of acid blockers.
C)  Taking a course of antibiotics.
D)  Reducing the stress in his daily life.E) B) and C)
F) B) and D)

Question 19

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

Accepted Answer

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

Question 20

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)

Exam 28: Prokaryotes

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

Correct Answer
verified

Prokaryotes that harvest both energy and carbon atoms from organic molecules are called

Correct Answer
verified

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

Correct Answer
verified

Why is chlamydia much more common than syphilis?

Correct Answer
verified
C

Cell walls of bacteria (domain Bacteria) usually consist of _____________, a network of polysaccharide molecules connected by polypeptide cross-links.

Correct Answer
verified

Many cells of the immune system have receptors that detect peptidoglycans and lipopolysaccharides.How do pathogenic bacteria avoid detection?

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 bi-product.This organism can best be classified as a

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

Correct Answer
verified
A

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

Correct Answer
verified

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

Correct Answer
verified

Bacterial sexually transmitted diseases include all of the following except

Correct Answer
verified

Are transformation and transduction the same process?

Correct Answer
verified

A microbiologist explains to one of her biology classes that her research focuses on the nucleoid region of the cholera bacteria.This means that she is studying a region within the bacterium that contains the

Correct Answer
verified

Prokaryotes are very important ecologically because of their involvement in all of the following except

Correct Answer
verified
C

A researcher observed a reduction in the number of chromosomes during cell division for a microbe, he concludes that the microbe must be

Correct Answer
verified

Plasmids are distinguished from bacterial chromosomes in that

Correct Answer
verified

Phil has chronic ulcers, he has been taking acid blockers and drinking vast amounts of liquid antacids.These help relieve the symptoms but he still suffers from ulcers.What would be the best course of action to treat the source of his ulcers?

Correct Answer
verified

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

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

Exam 28: Prokaryotes

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

Correct AnswerverifiedShow Answer

Prokaryotes that harvest both energy and carbon atoms from organic molecules are called

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Why is chlamydia much more common than syphilis?

Correct AnswerverifiedC

Cell walls of bacteria (domain Bacteria) usually consist of _____________, a network of polysaccharide molecules connected by polypeptide cross-links.

Correct AnswerverifiedShow Answer

Many cells of the immune system have receptors that detect peptidoglycans and lipopolysaccharides.How do pathogenic bacteria avoid detection?

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 bi-product.This organism can best be classified as a

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

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Bacterial sexually transmitted diseases include all of the following except

Correct AnswerverifiedShow Answer

Are transformation and transduction the same process?

Correct AnswerverifiedShow Answer

A microbiologist explains to one of her biology classes that her research focuses on the nucleoid region of the cholera bacteria.This means that she is studying a region within the bacterium that contains the

Correct AnswerverifiedShow Answer

Prokaryotes are very important ecologically because of their involvement in all of the following except

Correct AnswerverifiedC

A researcher observed a reduction in the number of chromosomes during cell division for a microbe, he concludes that the microbe must be

Correct AnswerverifiedShow Answer

Plasmids are distinguished from bacterial chromosomes in that

Correct AnswerverifiedShow Answer

Phil has chronic ulcers, he has been taking acid blockers and drinking vast amounts of liquid antacids.These help relieve the symptoms but he still suffers from ulcers.What would be the best course of action to treat the source of his ulcers?

Correct AnswerverifiedShow Answer

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

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

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C

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A

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C

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