Question 1

Select the TRUE statement regarding algae.

Accepted Answer

A)  Although most algae have a cellulose/pectin cell wall, some algae lack a cell wall. 
B)  Some algae can directly cause infectious diseases in humans and other animals. 
C)  Algae are plants and therefore possess a highly organized vascular system. 
D)  Algae are generally saprophytic, living off dead and decaying matter. 
E)  Algae always reproduce sexually, producing both haploid and diploid generations. 
A)  Although most algae have a cellulose/pectin cell wall, some algae lack a cell wall. 
B)  Some algae can directly cause infectious diseases in humans and other animals. 
C)  Algae are plants and therefore possess a highly organized vascular system. 
D)  Algae are generally saprophytic, living off dead and decaying matter. 
E)  Algae always reproduce sexually, producing both haploid and diploid generations.

Question 2

Phthirus pubis

Accepted Answer

A)  transmit bacterial disease. 
B)  cause "crabs." 
C)  infect the blood. 
D)  are transmitted by mosquitoes. 
E)  are biological vectors. 
A)  transmit bacterial disease. 
B)  cause "crabs." 
C)  infect the blood. 
D)  are transmitted by mosquitoes. 
E)  are biological vectors.

Question 3

Fungi capable of dimorphism grow either as

Accepted Answer

A)  rhizoids or hyphae. 
B)  yeast-like or mycelium. 
C)  germ tubes or buds. 
D)  spores or mushrooms. 
E)  yeast-like or mushrooms. 
A)  rhizoids or hyphae. 
B)  yeast-like or mycelium. 
C)  germ tubes or buds. 
D)  spores or mushrooms. 
E)  yeast-like or mushrooms.

Question 4

How would increased travel lead to increased spread of multicellular eukaryotic parasites?

Accepted Answer

A)  Many eukaryotic parasites are transmitted directly from person to person via airborne transmission, so getting an infected individual onto a plane of susceptible individuals would increase spread. 
B)  Many eukaryotic parasites depend on vectors (often small blood-sucking insects) for transmission, so moving an infected individual into an area with new vectors and new susceptible humans would increase spread. 
C)  It really would NOT; most individuals are screened for parasitic infections prior to traveling out of highly infected areas. We also have quarantine abilities at customs stations for individuals entering the United States. 
D)  Eukaryotic parasites are too small to travel great distances effectively; by hitching a ride on luggage, clothing, fruit/vegetables, and other food products, they can enter new geographic areas. 
E)  Traveling generally weakens a person's immune system, making them vulnerable to parasitic eukaryotes in any new place that they visit. 
A)  Many eukaryotic parasites are transmitted directly from person to person via airborne transmission, so getting an infected individual onto a plane of susceptible individuals would increase spread. 
B)  Many eukaryotic parasites depend on vectors (often small blood-sucking insects) for transmission, so moving an infected individual into an area with new vectors and new susceptible humans would increase spread. 
C)  It really would NOT; most individuals are screened for parasitic infections prior to traveling out of highly infected areas. We also have quarantine abilities at customs stations for individuals entering the United States. 
D)  Eukaryotic parasites are too small to travel great distances effectively; by hitching a ride on luggage, clothing, fruit/vegetables, and other food products, they can enter new geographic areas. 
E)  Traveling generally weakens a person's immune system, making them vulnerable to parasitic eukaryotes in any new place that they visit.

Question 5

Nematodes

Accepted Answer

A)  only infect aquatic plants. 
B)  may enter the gastrointestinal tract or the blood. 
C)  are carried by bacteria and fungi. 
D)  have flat, segmented bodies. 
E)  includes the trematodes. 
A)  only infect aquatic plants. 
B)  may enter the gastrointestinal tract or the blood. 
C)  are carried by bacteria and fungi. 
D)  have flat, segmented bodies. 
E)  includes the trematodes.

Question 6

Paralytic shellfish poisoning occurs when humans eat shellfish that have fed on

Accepted Answer

A)  Gonyaulax species. 
B)  Salmonella species. 
C)  Vibrio cholerae. 
D)  E. coli. 
E)  Volvox species. 
A)  Gonyaulax species. 
B)  Salmonella species. 
C)  Vibrio cholerae. 
D)  E. coli. 
E)  Volvox species.

Question 7

A tangle of fungal hyphae is generally known as a

Accepted Answer

A)  mycelium. 
B)  bud. 
C)  germ tube. 
D)  spore. 
E)  biofilm. 
A)  mycelium. 
B)  bud. 
C)  germ tube. 
D)  spore. 
E)  biofilm.

Question 8

Plant pathology grew in importance as a field of study after it was shown that the Irish potato blight was caused by

Accepted Answer

A)  bacteria. 
B)  viruses. 
C)  fungi. 
D)  amoeboid protozoa. 
E)  water molds. 
A)  bacteria. 
B)  viruses. 
C)  fungi. 
D)  amoeboid protozoa. 
E)  water molds.

Question 9

Yersinia pestis can be transmitted in more than one way. Most commonly, a person is bitten by an infected flea from which he or she may contract bubonic plague, characterized by large and tender lymph nodes (called buboes). If a person inhales respiratory droplets from an infected patient or animal, he or she may develop pneumonic plague with signs and symptoms of pneumonia (rare). When the causative organism spreads via the bloodstream, the person may develop septicemic plague in which there is bleeding in the skin and organs (rare). Which of the following would you tell your friend to put his mind at ease about going to Yosemite?

Accepted Answer

A)  Most people who get plague actually get the pneumonic form of the disease, transmitted through inhaled droplets. If you wear a face mask while you hike, you will be perfectly safe and will not contract the disease. 
B)  The people who contracted plague while in Yosemite were camping and were likely exposed to fleas from ground squirrels in the camp grounds. As you will be staying in a hotel, your risk of getting bitten by squirrel fleas is very low. 
C)  Plague is really not a very serious disease. People in the Middle Ages died from it because their immune systems were very weak in those days because of bad air pollution. 
D)  Plague is a serious disease but your immune system can easily get rid of it because the causative agent has no way to avoid your immune defenses. As such, it doesn't matter if you contract plague because you will easily recover. 
E)  Plague is a seasonal disease because the causative organism only grows at 28oC. It has only been reported to occur during May or October, so if you hike in July, there will be no risk. 
A)  Most people who get plague actually get the pneumonic form of the disease, transmitted through inhaled droplets. If you wear a face mask while you hike, you will be perfectly safe and will not contract the disease. 
B)  The people who contracted plague while in Yosemite were camping and were likely exposed to fleas from ground squirrels in the camp grounds. As you will be staying in a hotel, your risk of getting bitten by squirrel fleas is very low. 
C)  Plague is really not a very serious disease. People in the Middle Ages died from it because their immune systems were very weak in those days because of bad air pollution. 
D)  Plague is a serious disease but your immune system can easily get rid of it because the causative agent has no way to avoid your immune defenses. As such, it doesn't matter if you contract plague because you will easily recover. 
E)  Plague is a seasonal disease because the causative organism only grows at 28oC. It has only been reported to occur during May or October, so if you hike in July, there will be no risk.

Question 10

Fungi are important in

Accepted Answer

A)  food production. 
B)  food spoilage. 
C)  production of antibiotics. 
D)  disease of plants. 
E)  All of the choices are correct. 
A)  food production. 
B)  food spoilage. 
C)  production of antibiotics. 
D)  disease of plants. 
E)  All of the choices are correct.

Question 11

The pH at which most fungi thrive is ________.

Accepted Answer

A)  3 
B)  5 
C)  7 
D)  8 
E)  14 
A)  3 
B)  5 
C)  7 
D)  8 
E)  14

Question 12

Are all fungi detrimental (bad) for other organisms?

Accepted Answer

A)  Yes-think of molds that destroy plant crops, or fungal infections that cause athlete's foot. All fungi are bad for organisms they colonize. 
B)  Yes-fungi feed directly on organic material. They usually kill the other organism and feed on it after it has died. As such, they are always bad for other organisms. 
C)  No-it depends on the fungus and the relationship it has with the other organism. Some fungi can form a symbiotic relationship with plant roots that increases their nutrient and water absorption. This is good. 
D)  No-fungi are ALWAYS good when they interact with other organisms. There is never a negative aspect to such interactions. Both sides always benefit from the relationship. 
E)  Yes-fungi are generally parasitic. Parasitic relationships always result in damage to the host organism while the parasite benefits from the association. As such, fungi are always bad for other organisms. 
A)  Yes-think of molds that destroy plant crops, or fungal infections that cause athlete's foot. All fungi are bad for organisms they colonize. 
B)  Yes-fungi feed directly on organic material. They usually kill the other organism and feed on it after it has died. As such, they are always bad for other organisms. 
C)  No-it depends on the fungus and the relationship it has with the other organism. Some fungi can form a symbiotic relationship with plant roots that increases their nutrient and water absorption. This is good. 
D)  No-fungi are ALWAYS good when they interact with other organisms. There is never a negative aspect to such interactions. Both sides always benefit from the relationship. 
E)  Yes-fungi are generally parasitic. Parasitic relationships always result in damage to the host organism while the parasite benefits from the association. As such, fungi are always bad for other organisms.

Question 13

Once Y. pestis is in the human host, it is ingested by macrophages. Conditions within the macrophage activate certain genes in the bacterium, one of which is a gene for a capsule production. The capsule

Accepted Answer

A)  allows the bacteria to float in water. 
B)  allows the bacteria to exchange DNA with other bacteria. 
C)  allows the bacteria to avoid phagocytosis. 
D)  provides a source of nutrients for the bacteria. 
E)  allows the bacteria to survive excess heat. 
A)  allows the bacteria to float in water. 
B)  allows the bacteria to exchange DNA with other bacteria. 
C)  allows the bacteria to avoid phagocytosis. 
D)  provides a source of nutrients for the bacteria. 
E)  allows the bacteria to survive excess heat.

Question 14

One of the organisms that may cause red tide is

Accepted Answer

A)  green algae. 
B)  dinoflagellates. 
C)  brown algae. 
D)  euglenids. 
E)  diatoms. 
A)  green algae. 
B)  dinoflagellates. 
C)  brown algae. 
D)  euglenids. 
E)  diatoms.

Question 15

Algae are important environmentally as

Accepted Answer

A)  major producers of carbon dioxide. 
B)  major producers of oxygen. 
C)  local flora. 
D)  local contaminants. 
E)  supporting fungal growth. 
A)  major producers of carbon dioxide. 
B)  major producers of oxygen. 
C)  local flora. 
D)  local contaminants. 
E)  supporting fungal growth.

Question 16

Schizogony

Accepted Answer

A)  means multiple fissions AND is performed by bacteria. 
B)  is performed by bacteria AND is performed by protozoa. 
C)  is performed by protozoa AND is a type of reproduction. 
D)  is a form of reproduction AND means multiple fissions. 
E)  means multiple fissions AND is performed by protozoa. 
A)  means multiple fissions AND is performed by bacteria. 
B)  is performed by bacteria AND is performed by protozoa. 
C)  is performed by protozoa AND is a type of reproduction. 
D)  is a form of reproduction AND means multiple fissions. 
E)  means multiple fissions AND is performed by protozoa.

Question 17

Protozoans are usually multicellular and found in arid environments.

Accepted Answer

A) True 
 B)False

Question 18

Lichens may be an association of

Accepted Answer

A)  several different fungi. 
B)  protozoa and bacteria. 
C)  algae and fungi. 
D)  virus and algae. 
E)  fungus and ants. 
A)  several different fungi. 
B)  protozoa and bacteria. 
C)  algae and fungi. 
D)  virus and algae. 
E)  fungus and ants.

Question 19

Free-floating, photosynthetic organisms found in marine environments are

Accepted Answer

A)  Bucella. 
B)  phytoplankton. 
C)  blue-green algae. 
D)  krill. 
E)  omega-3s 
A)  Bucella. 
B)  phytoplankton. 
C)  blue-green algae. 
D)  krill. 
E)  omega-3s

Question 20

Algae may directly infect humans and cause disease.

Accepted Answer

A) True 
 B)False

Exam 12: The Eukaryotic Members of the Microbial World

Select the TRUE statement regarding algae.

Phthirus pubis

Fungi capable of dimorphism grow either as

How would increased travel lead to increased spread of multicellular eukaryotic parasites?

Nematodes

Paralytic shellfish poisoning occurs when humans eat shellfish that have fed on

A tangle of fungal hyphae is generally known as a

Plant pathology grew in importance as a field of study after it was shown that the Irish potato blight was caused by

Fungi are important in

The pH at which most fungi thrive is ________.

Are all fungi detrimental (bad) for other organisms?

Once Y. pestis is in the human host, it is ingested by macrophages. Conditions within the macrophage activate certain genes in the bacterium, one of which is a gene for a capsule production. The capsule

One of the organisms that may cause red tide is

Algae are important environmentally as

Schizogony

Protozoans are usually multicellular and found in arid environments.

Lichens may be an association of

Free-floating, photosynthetic organisms found in marine environments are

Algae may directly infect humans and cause disease.

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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