Question 1

Describe the major taxonomic divisions of prokaryotic organisms.

Accepted Answer

Bergey's Manual divides prokaryotes into two domains, the Archaea and the Bacteria, based on differences in their rRNA sequences. The Archaea are divided into three phyla, and the Bacteria are divided into 23 phyla. Among these 23 phyla are the phylum Firmicutes (which includes low G + C Gram- positive bacteria) and the phylum Actinobacteria (which includes high G + C Gram- positive bacteria). The majority of Gram- negative bacteria are placed in the phylum Proteobacteria, which itself is divided into five classes: alpha, beta, gamma, delta, and epsilon. These groups include a variety of pathogenic as well as environmentally important genera. Other Gram- negative bacteria, such as chlamydia and spirochetes, are not genetically related; however, they are grouped together in Bergey's for the sake of convenience.

Question 2

Halophiles are dependent on high salt concetrations for their growth and reproduction.

Accepted Answer

A) True 
 B)False  True

Question 3

Low G + C Gram- positive bacteria are

Accepted Answer

A)  in the phylum Firmicutes. 
B)  Clostridia. 
C)  Mycoplasma. 
D)  Both A and B are correct. 
E)  A, B, and C are correct. 
A)  in the phylum Firmicutes. 
B)  Clostridia. 
C)  Mycoplasma. 
D)  Both A and B are correct. 
E)  A, B, and C are correct. E

Question 4

The largest group of archaea is the

Accepted Answer

A)  thermophiles. 
B)  hyperthermophiles. 
C)  methanogens. 
D)  halophiles. 
E)  cyanobacteria. 
A)  thermophiles. 
B)  hyperthermophiles. 
C)  methanogens. 
D)  halophiles. 
E)  cyanobacteria.

Question 5

The Archaea are classified in three phyla.

Accepted Answer

A) True 
 B)False

Question 6

A flexible, spiral- shaped bacterium is called a

Accepted Answer

A)  coccobacillus. 
B)  spirillum. 
C)  sarcinae. 
D)  vibrio. 
E)  spirochete. 
A)  coccobacillus. 
B)  spirillum. 
C)  sarcinae. 
D)  vibrio. 
E)  spirochete.

Question 7

Heterocysts assist cyanobacteria with which of the following processes?

Accepted Answer

A)  nitrogen fixation 
B)  reproduction 
C)  photosynthesis 
D)  formation of galls 
E)  nitrification 
A)  nitrogen fixation 
B)  reproduction 
C)  photosynthesis 
D)  formation of galls 
E)  nitrification

Question 8

is an abnormal decrease in the number of white blood cells that is associated with Ehrlichia
infection.

Accepted Answer

The answer of is an abnormal decrease in the number...

Question 9

Which of the following bacterial genera protects areas of the body such as the intestinal tract and the vagina from invasion by pathogens?

Accepted Answer

A)  Mycobacterium 
B)  Staphylococcus 
C)  Listeria 
D)  Lactobacillus 
E)  Corynebacterium 
A)  Mycobacterium 
B)  Staphylococcus 
C)  Listeria 
D)  Lactobacillus 
E)  Corynebacterium

Question 10

Pleomorphic bacteria

Accepted Answer

A)  are flexible. 
B)  reproduce by snapping division. 
C)  have a slightly curved rod shape. 
D)  vary in size and shape. 
E)  are roughly spherical. 
A)  are flexible. 
B)  reproduce by snapping division. 
C)  have a slightly curved rod shape. 
D)  vary in size and shape. 
E)  are roughly spherical.

Question 11

are bacteria that can colonize and spoil meats preserved with high concentrations of salt.

Accepted Answer

The answer of are bacteria that can colonize and spoil...

Question 12

The are a group of Gram- positive bacteria that form branching filaments resembling those of fungi.

Accepted Answer

The answer of The are a group of Gram- positive...

Question 13

Which of the following types of microbes might be found in the Dead Sea?

Accepted Answer

A)  halophiles 
B)  actinomycetes 
C)  methanogens 
D)  phototrophic bacteria 
E)  hyperthermophiles 
A)  halophiles 
B)  actinomycetes 
C)  methanogens 
D)  phototrophic bacteria 
E)  hyperthermophiles

Question 14

All of the following are true of hyperthermophilic archaea EXCEPT:

Accepted Answer

A)  they are usually in the phylum Crenarchaeota. 
B)  they are extremophiles. 
C)  they can reproduce below 80°C. 
D)  their DNA polymerase is used to automate PCR. 
E)  they are prokaryotic. 
A)  they are usually in the phylum Crenarchaeota. 
B)  they are extremophiles. 
C)  they can reproduce below 80°C. 
D)  their DNA polymerase is used to automate PCR. 
E)  they are prokaryotic.

Question 15

Explain the significance of endospores.

Accepted Answer

Because an endospore can regenerate the

Question 16

Which of the following groups is noted for being pleomorphic?

Accepted Answer

A)  streptococci 
B)  actinomycetes 
C)  mycoplasmas 
D)  clostridia 
E)  lactobacilli 
A)  streptococci 
B)  actinomycetes 
C)  mycoplasmas 
D)  clostridia 
E)  lactobacilli

Question 17

All of the following are true of Epulopiscium EXCEPT:

Accepted Answer

A)  it was first considered a eukaryote. 
B)  it reproduces by binary fission. 
C)  it is related to Clostridium. 
D)  it is large enough to be seen without a microscope. 
E)  it is peritrichous. 
A)  it was first considered a eukaryote. 
B)  it reproduces by binary fission. 
C)  it is related to Clostridium. 
D)  it is large enough to be seen without a microscope. 
E)  it is peritrichous.

Question 18

Which of the following bacterial genera plays an important role in environmental nitrogen cycles?

Accepted Answer

A)  Azospirillum 
B)  Rhizobium 
C)  Nitrobacter 
D)  Both A and B are correct. 
E)  A, B, and C are correct. 
A)  Azospirillum 
B)  Rhizobium 
C)  Nitrobacter 
D)  Both A and B are correct. 
E)  A, B, and C are correct.

Question 19

Which of the following groups of bacteria is named for its resemblance to fungi?

Accepted Answer

A)  Staphylococcus 
B)  Clostridium 
C)  Corynebacterium 
D)  Actinomyces 
E)  Lactobacillus 
A)  Staphylococcus 
B)  Clostridium 
C)  Corynebacterium 
D)  Actinomyces 
E)  Lactobacillus

Question 20

Burkholderia is a common opportunistic pathogen of patients with .

Accepted Answer

The answer of Burkholderia is a common opportunistic pathogen of...

Exam 11: Characterizing and Classifying Prokaryotes

Describe the major taxonomic divisions of prokaryotic organisms.

Halophiles are dependent on high salt concetrations for their growth and reproduction.

Low G + C Gram- positive bacteria are

The largest group of archaea is the

The Archaea are classified in three phyla.

A flexible, spiral- shaped bacterium is called a

Heterocysts assist cyanobacteria with which of the following processes?

is an abnormal decrease in the number of white blood cells that is associated with Ehrlichia infection.

Which of the following bacterial genera protects areas of the body such as the intestinal tract and the vagina from invasion by pathogens?

Pleomorphic bacteria

are bacteria that can colonize and spoil meats preserved with high concentrations of salt.

The are a group of Gram- positive bacteria that form branching filaments resembling those of fungi.

Which of the following types of microbes might be found in the Dead Sea?

All of the following are true of hyperthermophilic archaea EXCEPT:

Explain the significance of endospores.

Which of the following groups is noted for being pleomorphic?

All of the following are true of Epulopiscium EXCEPT:

Which of the following bacterial genera plays an important role in environmental nitrogen cycles?

Which of the following groups of bacteria is named for its resemblance to fungi?

Burkholderia is a common opportunistic pathogen of patients with .

A Brief History of Microbiology

The Chemistry of Microbiology

Cell Structure and Function

Microscopy, Staining, and Classification

Microbial Metabolism

Microbial Nutrition and Growth

Microbial Genetics

Recombinant Dna Technology

Controlling Microbial Growth in the Environment

Controlling Microbial Growth in the Body: Antimicrobial Drugs

Characterizing and Classifying Eukaryotes

Characterizing and Classifying Viruses, Viroids, and Prions

Infection, Infectious Diseases, and Epidemiology

Innate Immunity

Adaptive Immunity

Immunization and Immune Testing

Aids and Other Immune Disorders

Microbial Diseases of the Skin and Wounds

Microbial Diseases of the Nervous System and Eyes

Microbial Cardiovascular and Systemic Diseases

Microbial Diseases of the Respiratory System

Microbial Diseases of the Digestive System

Microbial Diseases of the Urinary and Reproductive Systems

Applied and Environmental Microbiology

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