Question 1

What do viruses, viroids, and prions all have in common?

Accepted Answer

A)  They contain only RNA. 
B)  They are acellular agents of disease. 
C)  They contain only DNA. 
D)  They infect only animals. 
E)  They cause neurodegenerative diseases. 
A)  They contain only RNA. 
B)  They are acellular agents of disease. 
C)  They contain only DNA. 
D)  They infect only animals. 
E)  They cause neurodegenerative diseases.

Question 2

Microorganisms are involved in

Accepted Answer

A)  causing disease. 
B)  curing/treating disease. 
C)  preparing food. 
D)  cleaning up pollutants. 
E)  All of the answer choices are correct. 
A)  causing disease. 
B)  curing/treating disease. 
C)  preparing food. 
D)  cleaning up pollutants. 
E)  All of the answer choices are correct.

Question 3

The contradictory results obtained by different scientists apparently doing the same experiments in investigating spontaneous generation

Accepted Answer

A)  show that experiments should only be done once. 
B)  show the importance of exactly duplicating experimental conditions. 
C)  led to further experiments that ultimately proved spontaneous generation. 
D)  could not be explained by anyone involved in the work. 
E)  led to the development of swan-necked flasks. 
A)  show that experiments should only be done once. 
B)  show the importance of exactly duplicating experimental conditions. 
C)  led to further experiments that ultimately proved spontaneous generation. 
D)  could not be explained by anyone involved in the work. 
E)  led to the development of swan-necked flasks.

Question 4

All living organisms

Accepted Answer

A)  may be classified in four domains. 
B)  may be classified in three domains. 
C)  probably do not have a common ancestor. 
D)  have never shared genes between domains. 
E)  are capable of causing disease. 
A)  may be classified in four domains. 
B)  may be classified in three domains. 
C)  probably do not have a common ancestor. 
D)  have never shared genes between domains. 
E)  are capable of causing disease.

Question 5

Why are we concerned at all with monitoring emerging/reemerging diseases?

Accepted Answer

A)  These represent growing threats to human health that will require new scientific research and resources to effectively combat. 
B)  Because globalization leads to more chances for spread of illnesses into new areas and populations. Monitoring these illnesses will help us to protect people. 
C)  Because the speed of travel has increased, so it is far more likely that a serious pathogen can spread rapidly across the globe. Monitoring these illnesses will help us protect populations. 
D)  All of the answer choices are correct. 
E)  None of the answer choices is correct. 
A)  These represent growing threats to human health that will require new scientific research and resources to effectively combat. 
B)  Because globalization leads to more chances for spread of illnesses into new areas and populations. Monitoring these illnesses will help us to protect people. 
C)  Because the speed of travel has increased, so it is far more likely that a serious pathogen can spread rapidly across the globe. Monitoring these illnesses will help us protect populations. 
D)  All of the answer choices are correct. 
E)  None of the answer choices is correct.

Question 6

Janus tells you he knows that yeast cells are also small and round. He asks how scientists can tell the difference between yeasts and bacteria. Select the choice that best answers his question.

Accepted Answer

A)  Bacteria are microscopic. 
B)  Bacteria are photosynthetic. 
C)  Bacteria are unicellular. 
D)  Bacteria contain peptidoglycan. 
E)  Bacteria can be pathogenic. 
A)  Bacteria are microscopic. 
B)  Bacteria are photosynthetic. 
C)  Bacteria are unicellular. 
D)  Bacteria contain peptidoglycan. 
E)  Bacteria can be pathogenic.

Question 7

Thiomargarita namibiensis can not be a eukaryote because it is only 1 mm in width.

Accepted Answer

A) True 
 B)False

Question 8

An extreme environment in which archaea have been found is

Accepted Answer

A)  oceans. 
B)  boiling hot springs. 
C)  marshes. 
D)  refrigerators. 
E)  animal digestive tracts. 
A)  oceans. 
B)  boiling hot springs. 
C)  marshes. 
D)  refrigerators. 
E)  animal digestive tracts.

Question 9

The system by which organisms are named is referred to as

Accepted Answer

A)  systematics. 
B)  naming. 
C)  nomenclature. 
D)  cladistics. 
E)  bioinformatics. 
A)  systematics. 
B)  naming. 
C)  nomenclature. 
D)  cladistics. 
E)  bioinformatics.

Question 10

Normal microbiota

Accepted Answer

A)  are only found in the digestive tract. 
B)  protect us from disease by crowding out "bad" invading bacteria. 
C)  are only found on small select parts of our bodies. 
D)  always cause disease when growing on our bodies. 
E)  play no role in our general health. 
A)  are only found in the digestive tract. 
B)  protect us from disease by crowding out "bad" invading bacteria. 
C)  are only found on small select parts of our bodies. 
D)  always cause disease when growing on our bodies. 
E)  play no role in our general health.

Question 11

The prokaryotic domain includes

Accepted Answer

A)  bacteria. 
B)  archaea. 
C)  eukarya. 
D)  bacteria, archaea, AND fungi. 
E)  bacteria AND archaea. 
A)  bacteria. 
B)  archaea. 
C)  eukarya. 
D)  bacteria, archaea, AND fungi. 
E)  bacteria AND archaea.

Question 12

A microbiologist obtained two pure isolated biological samples: one of a virus, and one of a viroid. The labels came off during a move from one lab to the next, however. The scientist felt she could distinguish between the two samples by analyzing for the presence of a single type of molecule. What type of molecule would she be looking for to differentiate between the two?

Accepted Answer

A)  DNA 
B)  Protein 
C)  Lipids 
D)  RNA 
E)  Carbohydrate 
A)  DNA 
B)  Protein 
C)  Lipids 
D)  RNA 
E)  Carbohydrate

Question 13

The cell types that lack a membrane-bound nucleus and have rigid cell walls of peptidoglycan are

Accepted Answer

A)  eukaryotes. 
B)  fungi. 
C)  bacteria. 
D)  archaea. 
E)  protozoa. 
A)  eukaryotes. 
B)  fungi. 
C)  bacteria. 
D)  archaea. 
E)  protozoa.

Question 14

Select the statement that is TRUE regarding viroids.

Accepted Answer

A)  They are naked (lacking a protein shell) pieces of RNA. 
B)  They are naked (lacking a protein shell) pieces of DNA. 
C)  They are known to cause neurodegenerative diseases in animals. 
D)  They are composed of protein encasing DNA. 
E)  They are composed of both RNA and DNA within a lipid coat. 
A)  They are naked (lacking a protein shell) pieces of RNA. 
B)  They are naked (lacking a protein shell) pieces of DNA. 
C)  They are known to cause neurodegenerative diseases in animals. 
D)  They are composed of protein encasing DNA. 
E)  They are composed of both RNA and DNA within a lipid coat.

Question 15

Select the TRUE statement(s) regarding eukaryotes.

Accepted Answer

A)  Eukaryotes are all multicellular organisms AND have a membrane around the DNA. 
B)  Eukaryotes have a more complex internal structure than archaea or bacteria. 
C)  Eukaryotes have a simpler internal structure than archaea or bacteria AND have a membrane around the DNA. 
D)  Eukaryotes have a membrane around the DNA. 
E)  Eukaryotes have a more complex internal structure than archaea or bacteria AND have a membrane around the DNA. 
A)  Eukaryotes are all multicellular organisms AND have a membrane around the DNA. 
B)  Eukaryotes have a more complex internal structure than archaea or bacteria. 
C)  Eukaryotes have a simpler internal structure than archaea or bacteria AND have a membrane around the DNA. 
D)  Eukaryotes have a membrane around the DNA. 
E)  Eukaryotes have a more complex internal structure than archaea or bacteria AND have a membrane around the DNA.

Question 16

The human body only contains bacteria during illness.

Accepted Answer

A) True 
 B)False

Question 17

Viruses and bacteria are both based on the unit of a cell.

Accepted Answer

A) True 
 B)False

Question 18

If Pasteur had done his experiments investigating spontaneous generation in a horse stable,

Accepted Answer

A)  the results would probably have supported the idea of spontaneous generation. 
B)  the results would probably not have supported the idea of spontaneous generation. 
C)  the results would probably been the same as those obtained in a laboratory. 
D)  the results would probably have supported the idea of spontaneous biogenesis. 
E)  it would probably have taken several years to obtain any results. 
A)  the results would probably have supported the idea of spontaneous generation. 
B)  the results would probably not have supported the idea of spontaneous generation. 
C)  the results would probably been the same as those obtained in a laboratory. 
D)  the results would probably have supported the idea of spontaneous biogenesis. 
E)  it would probably have taken several years to obtain any results.

Question 19

The scientific name of an organism includes its

Accepted Answer

A)  family and genus. 
B)  first name and last name. 
C)  genus and species. 
D)  domain and genus. 
E)  domain and species. 
A)  family and genus. 
B)  first name and last name. 
C)  genus and species. 
D)  domain and genus. 
E)  domain and species.

Question 20

Bacteria and eukarya both contain membrane-bound organelles.

Accepted Answer

A) True 
 B)False

Exam 1: Humans and the Microbial World

What do viruses, viroids, and prions all have in common?

Microorganisms are involved in

The contradictory results obtained by different scientists apparently doing the same experiments in investigating spontaneous generation

All living organisms

Why are we concerned at all with monitoring emerging/reemerging diseases?

Janus tells you he knows that yeast cells are also small and round. He asks how scientists can tell the difference between yeasts and bacteria. Select the choice that best answers his question.

Thiomargarita namibiensis can not be a eukaryote because it is only 1 mm in width.

An extreme environment in which archaea have been found is

The system by which organisms are named is referred to as

Normal microbiota

The prokaryotic domain includes

The cell types that lack a membrane-bound nucleus and have rigid cell walls of peptidoglycan are

Select the statement that is TRUE regarding viroids.

Select the TRUE statement(s) regarding eukaryotes.

The human body only contains bacteria during illness.

Viruses and bacteria are both based on the unit of a cell.

If Pasteur had done his experiments investigating spontaneous generation in a horse stable,

The scientific name of an organism includes its

Bacteria and eukarya both contain membrane-bound organelles.

The Molecules of Life

Microscopy and Cell Structure

Dynamics of Microbial Growth

Control of Microbial Growth

Microbial Metabolism: Fueling Cell Growth

The Blueprint of Life, From Dna to Protein

Bacterial Genetics

Biotechnology

Identifying and Classifying Microorganisms

The Diversity of Bacteria and Archaea

The Eukaryotic Members of the Microbial World

Viruses, Viroids, and Prions

The Innate Immune Response

The Adaptive Immune Response

Host-Microbe Interactions

Immunological Disorders

Applications of Immune Responses

Epidemiology

Antimicrobial Medications

Respiratory System Infections

Skin Infections

Wound Infections

Digestive System Infections

Blood and Lymphatic Infections

Nervous System Infections

Genitourinary Tract Infections

Microbial Ecology

Environmental Microbiology: Treatment of Water, Wastes, and Polluted Habitats

Food Microbiology

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