Question 1

Please select the INCORRECT statement regarding helminths and the diseases they cause.

Accepted Answer

A)  Some helminths are inadvertently eaten with food. For example, eating undercooked pork containing Trichinella spiralis larvae is the most common cause of trichinellosis. 
B)  Some helminths are transmitted through insect bites. For example, Wuchereria bancrofti, the cause of elephantiasis, is transmitted by mosquitoes. 
C)  Some helminths are inadvertently ingested. For example, Onchocerca volvulus, the cause of River blindness, is transmitted by drinking contaminated water or eating fish carrying this parasite. 
D)  Some helminths burrow into people. For example, immature forms of hookworm larvae live in the soil and can burrow through human skin. 
E)  Sometime helminth eggs are ingested on the surface of contaminated foods. For example, pinworm eggs (Enterobius vermicularis) may be transmitted a food surface. 
A)  Some helminths are inadvertently eaten with food. For example, eating undercooked pork containing Trichinella spiralis larvae is the most common cause of trichinellosis. 
B)  Some helminths are transmitted through insect bites. For example, Wuchereria bancrofti, the cause of elephantiasis, is transmitted by mosquitoes. 
C)  Some helminths are inadvertently ingested. For example, Onchocerca volvulus, the cause of River blindness, is transmitted by drinking contaminated water or eating fish carrying this parasite. 
D)  Some helminths burrow into people. For example, immature forms of hookworm larvae live in the soil and can burrow through human skin. 
E)  Sometime helminth eggs are ingested on the surface of contaminated foods. For example, pinworm eggs (Enterobius vermicularis) may be transmitted a food surface. C

Question 2

Please select the FALSE statement regarding arthropod vectors.

Accepted Answer

A)  Mechanical vectors simply transfer a pathogen from one surface to another. 
B)  Biological vectors play an essential role in the life cycle of the pathogen. 
C)  Arthropods are very specific and always bite only one type of host. 
D)  The incidence of vector-borne diseases can be decreased by controlling the vector or the infected hosts. 
E)  Some arthropods cause disease even when they do not act as a vector. 
A)  Mechanical vectors simply transfer a pathogen from one surface to another. 
B)  Biological vectors play an essential role in the life cycle of the pathogen. 
C)  Arthropods are very specific and always bite only one type of host. 
D)  The incidence of vector-borne diseases can be decreased by controlling the vector or the infected hosts. 
E)  Some arthropods cause disease even when they do not act as a vector. C

Question 3

Plague is caused by Yersinia pestis, a Gram-negative facultatively anaerobic rod. It is non-motile and grows best at 28°C. Because you are a microbiology student, you know that the organism is

Accepted Answer

A)  a mesophile that grows best in the presence of oxygen but can also grow without it. 
B)  a psychrophile that grows best in the presence of oxygen but can also grow without it. 
C)  a psychrophile that grows best without oxygen but can also grow when oxygen is present. 
D)  a mesophile that grows best without oxygen but can also grow when oxygen is present. 
E)  a mesophile that cannot grow when oxygen is present. 
A)  a mesophile that grows best in the presence of oxygen but can also grow without it. 
B)  a psychrophile that grows best in the presence of oxygen but can also grow without it. 
C)  a psychrophile that grows best without oxygen but can also grow when oxygen is present. 
D)  a mesophile that grows best without oxygen but can also grow when oxygen is present. 
E)  a mesophile that cannot grow when oxygen is present. A

Question 4

The ability to exist as either a trophozoite or a cyst is characteristic of many

Accepted Answer

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

Question 5

Which of the following statements regarding protozoa is FALSE?

Accepted Answer

A)  All protozoa lack mitochondria. 
B)  Some protozoa are photosynthetic. 
C)  Some protozoa are parasitic. 
D)  Trichomoniasis is caused by a protozoan. 
E)  Protozoa are unicellular organisms. 
A)  All protozoa lack mitochondria. 
B)  Some protozoa are photosynthetic. 
C)  Some protozoa are parasitic. 
D)  Trichomoniasis is caused by a protozoan. 
E)  Protozoa are unicellular organisms.

Question 6

The terms yeast, mold, and mushrooms refers to fungal

Accepted Answer

A)  reproduction. 
B)  nutrition. 
C)  morphology. 
D)  parasites. 
E)  staining. 
A)  reproduction. 
B)  nutrition. 
C)  morphology. 
D)  parasites. 
E)  staining.

Question 7

The most necessary habitat requirement of protozoa is

Accepted Answer

A)  moisture. 
B)  light. 
C)  heat. 
D)  UV light. 
E)  basic pH. 
A)  moisture. 
B)  light. 
C)  heat. 
D)  UV light. 
E)  basic pH.

Question 8

Single-celled eukaryotic organisms that lack chlorophyll include

Accepted Answer

A)  protozoa AND yeasts. 
B)  algae AND yeasts. 
C)  protozoa AND cyanobacteria. 
D)  yeasts AND cyanobacteria. 
E)  algae AND archaea. 
A)  protozoa AND yeasts. 
B)  algae AND yeasts. 
C)  protozoa AND cyanobacteria. 
D)  yeasts AND cyanobacteria. 
E)  algae AND archaea.

Question 9

Convergent evolution

Accepted Answer

A)  explains the morphological similarity yet major genetic differences found between slime molds and fungi. 
B)  refers to two different organisms that develop similar characteristics in adaptation to similar environments 
C)  refers to the one organism dividing into two AND refers to two different organisms that develop similar characteristics in adaptation to similar environments. 
D)  explains the morphological similarity yet major genetic differences found between slime molds and fungi AND refers to two different organisms that develop similar characteristics in adaptation to similar environments. 
E)  refers to one organism dividing into two AND explains the morphological similarity yet major genetic differences found between slime molds and fungi. 
A)  explains the morphological similarity yet major genetic differences found between slime molds and fungi. 
B)  refers to two different organisms that develop similar characteristics in adaptation to similar environments 
C)  refers to the one organism dividing into two AND refers to two different organisms that develop similar characteristics in adaptation to similar environments. 
D)  explains the morphological similarity yet major genetic differences found between slime molds and fungi AND refers to two different organisms that develop similar characteristics in adaptation to similar environments. 
E)  refers to one organism dividing into two AND explains the morphological similarity yet major genetic differences found between slime molds and fungi.

Question 10

Some arthropods cause disease even when they do not act as a vector. Which of the following is an example of this?

Accepted Answer

A)  Scabies is characterized by an itchy rash caused by allergic reactions to female mites that have burrowed into the outer layers of skin. 
B)  The pubic louse is commonly transmitted during sexual intercourse and can cause an unpleasant itch associated with "crabs." 
C)  Dust mites do not transmit infectious disease, but inhalation of the mites and their waste products can sometimes trigger asthma. 
D)  The larvae of some mites are called "chiggers" and may cause intense itching where they attach and feed on fluids within skin cells. 
E)  These are all examples of the situation described. 
A)  Scabies is characterized by an itchy rash caused by allergic reactions to female mites that have burrowed into the outer layers of skin. 
B)  The pubic louse is commonly transmitted during sexual intercourse and can cause an unpleasant itch associated with "crabs." 
C)  Dust mites do not transmit infectious disease, but inhalation of the mites and their waste products can sometimes trigger asthma. 
D)  The larvae of some mites are called "chiggers" and may cause intense itching where they attach and feed on fluids within skin cells. 
E)  These are all examples of the situation described.

Question 11

Protozoans are eukaryotes and as such will always possess a nucleus, mitochondria, and chloroplasts.

Accepted Answer

A) True 
 B)False

Question 12

Gonyaulax

Accepted Answer

A)  produces a protein neurotoxin AND is a dinoflagellate. 
B)  produces a non-protein neurotoxin AND is a dinoflagellate. 
C)  infects the nervous system of humans AND is a monoflagellate. 
D)  is a monoflagellate AND produces a non-protein neurotoxin. 
E)  produces a non-protein enterotoxin AND is a dinoflagellate. 
A)  produces a protein neurotoxin AND is a dinoflagellate. 
B)  produces a non-protein neurotoxin AND is a dinoflagellate. 
C)  infects the nervous system of humans AND is a monoflagellate. 
D)  is a monoflagellate AND produces a non-protein neurotoxin. 
E)  produces a non-protein enterotoxin AND is a dinoflagellate.

Question 13

Which of the statements regarding Naegleria fowleri is FALSE?

Accepted Answer

A)  It is a small, Gram-negative, flagellated diplococcus. 
B)  It is swims though water as a flagellated form. 
C)  Once in a human host, it assumes an amoeboid form. 
D)  It causes primary amebic meningoencephalitis (brain eating disease). 
E)  It forms a cyst under adverse environmental conditions. 
A)  It is a small, Gram-negative, flagellated diplococcus. 
B)  It is swims though water as a flagellated form. 
C)  Once in a human host, it assumes an amoeboid form. 
D)  It causes primary amebic meningoencephalitis (brain eating disease). 
E)  It forms a cyst under adverse environmental conditions.

Question 14

Why were the slime molds and water molds once considered to be fungi?

Accepted Answer

A)  Early identification methods focused on appearances rather than biochemical characteristics. 
B)  Early identification methods focused on appearances rather than genetic similarities/differences. 
C)  Water molds and slime molds are STILL considered to be fungi. 
D)  They have the same material in their cell walls (chitin) that fungi possess. 
E)  Water molds and slime molds always occur in the same habitats as fungi. 
A)  Early identification methods focused on appearances rather than biochemical characteristics. 
B)  Early identification methods focused on appearances rather than genetic similarities/differences. 
C)  Water molds and slime molds are STILL considered to be fungi. 
D)  They have the same material in their cell walls (chitin) that fungi possess. 
E)  Water molds and slime molds always occur in the same habitats as fungi.

Question 15

Fungus grows well on fruits and many vegetables due to their alkaline pH.

Accepted Answer

A) True 
 B)False

Question 16

Algae

Accepted Answer

A)  often grow in areas where other forms of life may have difficulty. 
B)  are strictly macroscopic organisms. 
C)  have a vascular system similar to that of plants. 
D)  are only found in the soil. 
E)  are always saprophytic or parasitic. 
A)  often grow in areas where other forms of life may have difficulty. 
B)  are strictly macroscopic organisms. 
C)  have a vascular system similar to that of plants. 
D)  are only found in the soil. 
E)  are always saprophytic or parasitic.

Question 17

Algae have a vascular system very similar to that found in plants.

Accepted Answer

A) True 
 B)False

Question 18

Most of the medically important multicellular parasites are arthropods or helminths.

Accepted Answer

A) True 
 B)False

Question 19

Fungi that are important for fermentation of fruits

Accepted Answer

A)  are mushrooms. 
B)  are obligate aerobes. 
C)  grow well at neutral pH. 
D)  secrete degradative enzymes. 
E)  All of the choices are correct. 
A)  are mushrooms. 
B)  are obligate aerobes. 
C)  grow well at neutral pH. 
D)  secrete degradative enzymes. 
E)  All of the choices are correct.

Question 20

Which statement about aflatoxins is NOT true?

Accepted Answer

A)  They are produced by Aspergillus. 
B)  They are possible carcinogens. 
C)  They may be found in peanuts. 
D)  They are toxins. 
E)  They are produced by Candida. 
A)  They are produced by Aspergillus. 
B)  They are possible carcinogens. 
C)  They may be found in peanuts. 
D)  They are toxins. 
E)  They are produced by Candida.

Exam 12: The Eukaryotic Members of the Microbial World

Please select the INCORRECT statement regarding helminths and the diseases they cause.

Please select the FALSE statement regarding arthropod vectors.

Plague is caused by Yersinia pestis, a Gram-negative facultatively anaerobic rod. It is non-motile and grows best at 28°C. Because you are a microbiology student, you know that the organism is

The ability to exist as either a trophozoite or a cyst is characteristic of many

Which of the following statements regarding protozoa is FALSE?

The terms yeast, mold, and mushrooms refers to fungal

The most necessary habitat requirement of protozoa is

Single-celled eukaryotic organisms that lack chlorophyll include

Convergent evolution

Some arthropods cause disease even when they do not act as a vector. Which of the following is an example of this?

Protozoans are eukaryotes and as such will always possess a nucleus, mitochondria, and chloroplasts.

Gonyaulax

Which of the statements regarding Naegleria fowleri is FALSE?

Why were the slime molds and water molds once considered to be fungi?

Fungus grows well on fruits and many vegetables due to their alkaline pH.

Algae

Algae have a vascular system very similar to that found in plants.

Most of the medically important multicellular parasites are arthropods or helminths.

Fungi that are important for fermentation of fruits

Which statement about aflatoxins is NOT true?

Humans and the Microbial World

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

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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