Question 1

Streptomyces are obligate aerobic soil bacteria that infect many root plants,causing scabs on their surfaces.You would expect to find more Streptomyces near the surface of the soil.

Accepted Answer

A) True 
 B)False

Question 2

Most bacteria inside and on the human body cause disease.

Accepted Answer

A) True 
 B)False

Question 3

A prokaryote that occupies a habitat that is extremely salty is a/n

Accepted Answer

A)   hydrophile.
B)   acidophile.
C)   halophile.
D)   thermophile.
E)   basophile.F) C) and D)
G) B) and D)

Question 4

Many prokaryotes play vital roles in global nutrient cycles.

Accepted Answer

A) True 
 B)False

Question 5

Figuer: 
-The phylogeny of MRSA and toxic shock syndrome strains of Staphylococcus aureus indicates that an effort to develop a medicine that is effective against one DNA strain of the MRSA would

Accepted Answer

A)   likely be very effective against many of the strains, because of a specific MRSA gene indicated to by the data.
B)   not likely be effective against varied genetic strains in which the MRSA have developed.
C)   work in different ways, but be just as effective against the varied strains of MRSA.
D)   change the rates of mutations among MRSA strains, impacting the epidemic rates of spread of the bacteria.
E)   None of the answer options are indicated by the data in this phylogeny.F) All of the above
G) None of the above

Question 6

A prokaryote that occupies a habitat that is characterized by extreme heat (above 50 degrees Celsius) is a(n)

Accepted Answer

A)   thermophile.
B)   basophile.
C)   hydrophile.
D)   acidophile.
E)   halophile.F) B) and C)
G) A) and B)

Question 7

In a tetanus shot,patients are injected with small amounts of tetanospasmin,a toxin produced by the Clostridium tetani,the bacterium that causes tetanus.The gene for this protein is carried on a plasmid in the bacterium.Which of the following is true of this gene?

Accepted Answer

A)   It can enter another bacterium by transformation.
B)   It cannot go through vertical gene transfer.
C)   It is found in the nucleus of the Clostridium tetani.
D)   It cannot go through horizontal gene transfer.
E)   It is part of the Clostridium tetani chromosome.F) A) and B)
G) All of the above

Question 8

The three most common shapes of prokaryotes are

Accepted Answer

A)   star-shaped, cubical, and spherical.
B)   rod-shaped, star-shaped, and cubical.
C)   spherical, rod-shaped, and spiral.
D)   cubical, spiral, and thread-like.
E)   cubical, spherical, and rod-shaped.F) B) and E)
G) A) and D)

Question 9

The domain(s) that contain(s) prokaryotes is(are)

Accepted Answer

A)   Both Bacteria and Eukarya are correct.
B)   Archaea.
C)   Bacteria.
D)   Both Archaea and Bacteria are correct.
E)   Eukarya.F) B) and C)
G) B) and D)

Question 10

Heterotrophs must acquire carbon from organic molecules produced from other organisms.

Accepted Answer

A) True 
 B)False

Question 11

The structures of prokaryotes that are used to transfer DNA from one cell to another are

Accepted Answer

A)   cilia.
B)   flagella.
C)   sex pili.
D)   endospores.
E)   attachment pili.F) A) and E)
G) B) and E)

Question 12

Because Archaea were first found in environments that lacked oxygen or were very hot,acidic,or salty,they were nicknamed "extremophiles."

Accepted Answer

A) True 
 B)False

Question 13

In an opportunity to collect an electron microscope image of cells you found on a class field trip,you observe that there is a portion,or region of the bacterial cells that contains the chromosome,without a phospholipid membrane surrounding it.You would correctly identify and label the region as the

Accepted Answer

A)   cell wall.
B)   ribosome.
C)   cell membrane.
D)   nucleoid.
E)   nucleus.F) A) and D)
G) A) and C)

Question 14

Bacteria and archaea use the same four bases in their DNA as eukaryotes.This supports which of the following statements?

Accepted Answer

A)   DNA evolved independently at least three times.
B)   DNA was the original genetic material.
C)   All three domains arose from a common ancestor.
D)   Bacteria, archaea, and eukaryotes could interbreed.
E)   Bacteria, archaea, and eukaryotes contain the same set of genes.F) A) and D)
G) B) and E)

Question 15

Infections by Helicobacter pylori cause 90% of peptic ulcers in the United States.These bacteria have pili that are only expressed in acidic conditions.A characteristic of this organism should be an ability to

Accepted Answer

A)   enter the bloodstream.
B)   move in the direction opposite the pili.
C)   avoid ingestion by cells in the immune system.
D)   attach to cells in the host organism's stomach.
E)   induce a large antibody response.F) A) and E)
G) B) and D)

Question 16

Which of the following is true of gram-positive bacteria,and not of gram-negative bacteria?

Accepted Answer

A)   Its cell wall is made of a thick layer of peptidoglycan.
B)   It has a thick cell membrane.
C)   It is more likely to trigger an immune response and cause inflammation and fever.
D)   It is larger, and thus weighs more grams.
E)   It has a nucleus.F) A) and E)
G) A) and D)

Exam 17: Bacteria and Archaea

In an opportunity to collect an electron microscope image of cells you found on a class field trip,you observe that there is a portion,or region of the bacterial cells that contains the chromosome,without a phospholipid membrane surrounding it.You would correctly identify and label the region as the

Correct Answer
verified

A prokaryote that occupies a habitat that is extremely salty is a/n

Correct Answer
verified

Heterotrophs must acquire carbon from organic molecules produced from other organisms.

Correct Answer
verified

Because Archaea were first found in environments that lacked oxygen or were very hot,acidic,or salty,they were nicknamed "extremophiles."

Correct Answer
verified

Bacteria and archaea use the same four bases in their DNA as eukaryotes.This supports which of the following statements?

Correct Answer
verified

Figuer: -The phylogeny of MRSA and toxic shock syndrome strains of Staphylococcus aureus indicates that an effort to develop a medicine that is effective against one DNA strain of the MRSA would

Correct Answer
verified

A prokaryote that occupies a habitat that is characterized by extreme heat (above 50 degrees Celsius) is a(n)

Correct Answer
verified

Many prokaryotes play vital roles in global nutrient cycles.

Correct Answer
verified

The three most common shapes of prokaryotes are

Correct Answer
verified

Most bacteria inside and on the human body cause disease.

Correct Answer
verified

The domain(s) that contain(s) prokaryotes is(are)

Correct Answer
verified

Infections by Helicobacter pylori cause 90% of peptic ulcers in the United States.These bacteria have pili that are only expressed in acidic conditions.A characteristic of this organism should be an ability to

Correct Answer
verified

In a tetanus shot,patients are injected with small amounts of tetanospasmin,a toxin produced by the Clostridium tetani,the bacterium that causes tetanus.The gene for this protein is carried on a plasmid in the bacterium.Which of the following is true of this gene?

Correct Answer
verified

Which of the following is true of gram-positive bacteria,and not of gram-negative bacteria?

Correct Answer
verified

Streptomyces are obligate aerobic soil bacteria that infect many root plants,causing scabs on their surfaces.You would expect to find more Streptomyces near the surface of the soil.

Correct Answer
verified

The structures of prokaryotes that are used to transfer DNA from one cell to another are

Correct Answer
verified

Exam 17: Bacteria and Archaea

Correct AnswerverifiedShow Answer

A prokaryote that occupies a habitat that is extremely salty is a/n

Correct AnswerverifiedShow Answer

Heterotrophs must acquire carbon from organic molecules produced from other organisms.

Correct AnswerverifiedShow Answer

Because Archaea were first found in environments that lacked oxygen or were very hot,acidic,or salty,they were nicknamed "extremophiles."

Correct AnswerverifiedShow Answer

Bacteria and archaea use the same four bases in their DNA as eukaryotes.This supports which of the following statements?

Correct AnswerverifiedShow Answer

Figuer: -The phylogeny of MRSA and toxic shock syndrome strains of Staphylococcus aureus indicates that an effort to develop a medicine that is effective against one DNA strain of the MRSA would

Correct AnswerverifiedShow Answer

A prokaryote that occupies a habitat that is characterized by extreme heat (above 50 degrees Celsius) is a(n)

Correct AnswerverifiedShow Answer

Many prokaryotes play vital roles in global nutrient cycles.

Correct AnswerverifiedShow Answer

The three most common shapes of prokaryotes are

Correct AnswerverifiedShow Answer

Most bacteria inside and on the human body cause disease.

Correct AnswerverifiedShow Answer

The domain(s) that contain(s) prokaryotes is(are)

Correct AnswerverifiedShow Answer

Infections by Helicobacter pylori cause 90% of peptic ulcers in the United States.These bacteria have pili that are only expressed in acidic conditions.A characteristic of this organism should be an ability to

Correct AnswerverifiedShow Answer

In a tetanus shot,patients are injected with small amounts of tetanospasmin,a toxin produced by the Clostridium tetani,the bacterium that causes tetanus.The gene for this protein is carried on a plasmid in the bacterium.Which of the following is true of this gene?

Correct AnswerverifiedShow Answer

Which of the following is true of gram-positive bacteria,and not of gram-negative bacteria?

Correct AnswerverifiedShow Answer

Streptomyces are obligate aerobic soil bacteria that infect many root plants,causing scabs on their surfaces.You would expect to find more Streptomyces near the surface of the soil.

Correct AnswerverifiedShow Answer

The structures of prokaryotes that are used to transfer DNA from one cell to another are

Correct AnswerverifiedShow Answer

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