Question 1

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

Accepted Answer

A)  Insertion sequences (IS) are present in both the F plasmid and the bacterial chromosome.
B)  IS elements are transposable elements.
C)  Insertion of the F plasmid into the bacterial chromosome to produce an Hfr cell causes the loss of an equivalent portion of the chromosome.
D)  Hfr cells can transfer the whole chromosome in about 90 minutes.
E)  The number of bacterial genes that are transferred into the recipient cell depends on how long the conjugation bridge is maintained.

Question 2

Various techniques have been developed to isolate strains of bacteria carrying a particular mutation.In one,bacteria containing wild-type cells and cells of a desired mutant are grown on a medium lacking the nutrient for which the desired mutants are auxotrophic but containing the an antibiotic that only kills growing cells.In this environment,

Accepted Answer

A)  both wild-type and mutant cells are killed.
B)  both wild-type and mutant cells survive.
C)  wild-type cells survive;mutant cells die.
D)  wild-type cells die;mutant cells survive.
E)  only double mutants survivE.

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)  Cells with integrated F' plasmid have two copies of some genes.

Question 4

All of the following are ways that prokaryotes can exchange genetic material except

Accepted Answer

A)  vertical gene transfer.
B)  conjugation.
C)  transduction.
D)  transformation.
E)  exchange of R plasmids.

Question 5

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 Enterobacteraceae is a significant public health risk. B

Question 6

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.

Question 7

Which of the following statements about specialized transduction is false?

Accepted Answer

A)  Specialized transduction always requires phage with a lysogenic life cycle.
B)  The integrated phage is called a prophage.
C)  Genes for excision and initiation of lysis are in the prophage.
D)  Prophage can include bacterial genes.
E)  Specialized transduction never produces cells that are partial diploids.

Question 8

The bacterium E coli has about 5000 genes.Assume a mutation rate of 1 in every one million genes.If you start with one bacterium that divides to produce two bacteria every 20 minutes,how many mutant E coli will there be after 10 hours?

Accepted Answer

A)  900
B)  1.1 X 103
C)  5.4 X 106
D)  1.1 X 109
E)  2.1 X 1011

Question 9

Choose letter of the best match from the following:
-Transfer of bacterial genes involving a prophage.

Accepted Answer

A)  conjugation
B)  plasmid
C)  transduction (generalized) 
D)  transduction (specialized) 
E)  transformation (artificial) F) transformation (natural)

Question 10

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 division

Question 11

You expose a tube of bacteria to ultraviolet radiation to induce mutations.You then spread the bacteria on a plate containing media with all know 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 lacking a required nutrient would include what type of cells?

Accepted Answer

A)  only wild-type bacteria
B)  only bacteria mutant for the supplied nutrient
C)  only mutant bacteria but not those mutant for the supplied nutrient
D)  wild-type bacteria and bacteria mutant for the supplied nutrient
E)  wild-type bacteria and all mutant bacteria except those mutant for the supplied nutrient

Question 12

Choose letter of the best match from the following:
-Transfer of bacterial genes by a lytic phage.

Accepted Answer

A)  conjugation
B)  plasmid
C)  transduction (generalized) 
D)  transduction (specialized) 
E)  transformation (artificial) F) transformation (natural)

Question 13

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 14

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)  chemoautotroph.
B)  chemoheterotroph.
C)  photoautotroph.
D)  photoheterotroph.
E)  pathogen.

Question 15

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.

Question 16

Certain bacteria are the only organisms that are capable of fixing atmospheric

Accepted Answer

A)  carbon dioxide.
B)  oxygen.
C)  hydrogen.
D)  carbon.
E)  nitrogen. E

Question 17

Four of the five statements listed below are characteristics of most prokaryotic organisms.Select the exception.

Accepted Answer

A)  Prokaryotic cell diameters are one micrometer or less.
B)  Prokaryotic organisms are unicellular.
C)  Prokaryotic organisms use mitosis for their nuclear division.
D)  Prokaryotic organisms have a cell wall.
E)  Prokaryotic organisms do not have a membrane around their hereditary materials.

Question 18

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.

Question 19

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.

Question 20

In which of the following characteristics,prokaryotes and eukaryotes are similar?

Accepted Answer

A)  cell division
B)  internal compartmentalization
C)  flagella
D)  contain ribosomes
E)  enzymes localized in the plasma membrane D

Exam 28: Prokaryotes

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

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

Correct Answer
verified

All of the following are ways that prokaryotes can exchange genetic material except

Correct Answer
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Which of the following statements about transformation is false?

Correct Answer
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B

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

Correct Answer
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Which of the following statements about specialized transduction is false?

Correct Answer
verified

The bacterium E coli has about 5000 genes.Assume a mutation rate of 1 in every one million genes.If you start with one bacterium that divides to produce two bacteria every 20 minutes,how many mutant E coli will there be after 10 hours?

Correct Answer
verified

Choose letter of the best match from the following: -Transfer of bacterial genes involving a prophage.

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

Correct Answer
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Choose letter of the best match from the following: -Transfer of bacterial genes by a lytic phage.

Correct Answer
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Carbon fixation carried out by the prokaryotes known as the __________ involves chlorophyll a.

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

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

Correct Answer
verified

Certain bacteria are the only organisms that are capable of fixing atmospheric

Correct Answer
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E

Four of the five statements listed below are characteristics of most prokaryotic organisms.Select the exception.

Correct Answer
verified

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

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

Correct Answer
verified

In which of the following characteristics,prokaryotes and eukaryotes are similar?

Correct Answer
verified
D

Exam 28: Prokaryotes

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

All of the following are ways that prokaryotes can exchange genetic material except

Correct AnswerverifiedShow Answer

Which of the following statements about transformation is false?

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

Which of the following statements about specialized transduction is false?

Correct AnswerverifiedShow Answer

The bacterium E coli has about 5000 genes.Assume a mutation rate of 1 in every one million genes.If you start with one bacterium that divides to produce two bacteria every 20 minutes,how many mutant E coli will there be after 10 hours?

Correct AnswerverifiedShow Answer

Choose letter of the best match from the following: -Transfer of bacterial genes involving a prophage.

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

Correct AnswerverifiedShow Answer

Choose letter of the best match from the following: -Transfer of bacterial genes by a lytic phage.

Correct AnswerverifiedShow Answer

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

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

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

Correct AnswerverifiedShow Answer

Certain bacteria are the only organisms that are capable of fixing atmospheric

Correct AnswerverifiedE

Four of the five statements listed below are characteristics of most prokaryotic organisms.Select the exception.

Correct AnswerverifiedShow Answer

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

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

Correct AnswerverifiedShow Answer

In which of the following characteristics,prokaryotes and eukaryotes are similar?

Correct AnswerverifiedD

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B

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E

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D