Question 1

The type of symbiotic relationship in which one member benefits and the other member is not affected is called _________________.

Accepted Answer

The answer of The type of symbiotic relationship in which...

Question 2

Most microbe-host relationships are harmful.

Accepted Answer

A) True 
 B)False

Question 3

The nitrogenase enzyme is irreversibly inactivated by hydrogen.

Accepted Answer

A) True 
 B)False

Question 4

What is an endophyte?

Accepted Answer

A)  A parasite of a plant. 
B)  A parasite of an animal. 
C)  A symbiont that lives inside plant cells. 
D)  A member of the plant root rhizosphere. 
E)  A member of the intestinal tract microbial community. 
A)  A parasite of a plant. 
B)  A parasite of an animal. 
C)  A symbiont that lives inside plant cells. 
D)  A member of the plant root rhizosphere. 
E)  A member of the intestinal tract microbial community.

Question 5

The hydrogen and carbon dioxide produced in the gut of the lower termite are used to produce __________ by symbiotic microbes.

Accepted Answer

A)  methane 
B)  lactate 
C)  fatty acids 
D)  amino acids 
E)  glucose 
A)  methane 
B)  lactate 
C)  fatty acids 
D)  amino acids 
E)  glucose

Question 6

The mycobiont of a lichen receives sugars from the photobiont as a benefit from this relationship while the photobiont receives _______________ from the mycobiont as a benefit.

Accepted Answer

A)  amino acids 
B)  ATP 
C)  inorganic nutrients and protection from desiccation 
D)  protection from predation 
E)  vitamins and amino acids 
A)  amino acids 
B)  ATP 
C)  inorganic nutrients and protection from desiccation 
D)  protection from predation 
E)  vitamins and amino acids

Question 7

Hindgut fermenters have greater fermentation efficiency than ruminants.

Accepted Answer

A) True 
 B)False

Question 8

Herbivores require microorganisms to help them with the digestion of this compound.

Accepted Answer

A)  starch 
B)  glycogen 
C)  cellulose 
D)  proteins 
E)  nucleic acids 
A)  starch 
B)  glycogen 
C)  cellulose 
D)  proteins 
E)  nucleic acids

Question 9

Scientists are able to make an insect symbiont free by this method.

Accepted Answer

A)  Hatching insect eggs in a sterile environment. 
B)  Treating the insect with an antibiotic. 
C)  Mating the insect with a symbiont free insect. 
D)  Irradiating insect eggs. 
E)  Putting the insect on a different diet. 
A)  Hatching insect eggs in a sterile environment. 
B)  Treating the insect with an antibiotic. 
C)  Mating the insect with a symbiont free insect. 
D)  Irradiating insect eggs. 
E)  Putting the insect on a different diet.

Question 10

Intestinal microorganisms are important for the proper functioning of the immune system.

Accepted Answer

A) True 
 B)False

Question 11

Lower termites feed primarily on wood and contain symbiotic:

Accepted Answer

A)  bacteria in their intestine. 
B)  bacteria and archaeons in their intestine. 
C)  fungi in their intestine. 
D)  protozoa, bacteria, and archaeons in their intestine. 
E)  protozoa and fungi in their intestine. 
A)  bacteria in their intestine. 
B)  bacteria and archaeons in their intestine. 
C)  fungi in their intestine. 
D)  protozoa, bacteria, and archaeons in their intestine. 
E)  protozoa and fungi in their intestine.

Question 12

Endophytes are microorganisms that live within the tissue of ___________.

Accepted Answer

The answer of Endophytes are microorganisms that live within the...

Question 13

The human colon contains more microbial cells than human cells that make up the entire body.

Accepted Answer

A) True 
 B)False

Question 14

How do termites obtain nitrogen in their diet?

Accepted Answer

A)  From digestion of proteins. 
B)  From digestion of nucleic acids. 
C)  From nitrogen fixing bacteria in their gut. 
D)  From urea. 
E)  From nitrogen fixing protozoa. 
A)  From digestion of proteins. 
B)  From digestion of nucleic acids. 
C)  From nitrogen fixing bacteria in their gut. 
D)  From urea. 
E)  From nitrogen fixing protozoa.

Question 15

Which of these is the MOST abundant bacterial group in the colon?

Accepted Answer

A)  members of the phylum Proteobacteria 
B)  the family Enterobacteriaceae 
C)  obligate anaerobes 
D)  facultative anaerobes 
E)  lactobacilli. 
A)  members of the phylum Proteobacteria 
B)  the family Enterobacteriaceae 
C)  obligate anaerobes 
D)  facultative anaerobes 
E)  lactobacilli.

Question 16

Which of these is true of a mutualistic relationship?

Accepted Answer

A)  Neither organism benefits or is harmed by the relationship. 
B)  One member benefits and the other member is harmed. 
C)  One member benefits and the other member does not receive any benefit. 
D)  Both organisms benefit. 
E)  Both members are harmed from the relationship. 
A)  Neither organism benefits or is harmed by the relationship. 
B)  One member benefits and the other member is harmed. 
C)  One member benefits and the other member does not receive any benefit. 
D)  Both organisms benefit. 
E)  Both members are harmed from the relationship.

Question 17

What is the human microbiome composed of?

Accepted Answer

A)  Microbes that live in the intestinal tract of humans. 
B)  All the microbes that cause disease in humans. 
C)  All microbes that live on or within the human body. 
D)  Microbes that contribute to the health of humans. 
E)  Microbes that live on human skin. 
A)  Microbes that live in the intestinal tract of humans. 
B)  All the microbes that cause disease in humans. 
C)  All microbes that live on or within the human body. 
D)  Microbes that contribute to the health of humans. 
E)  Microbes that live on human skin.

Question 18

The red color of plant root nodules is due to this oxygen binding protein.

Accepted Answer

A)  cytochrome c 
B)  flavoprotein 
C)  leghemoglobin 
D)  menaquinone 
E)  nitrate reductase 
A)  cytochrome c 
B)  flavoprotein 
C)  leghemoglobin 
D)  menaquinone 
E)  nitrate reductase

Question 19

All microorganisms that live on or within the human body are referred to collectively as the human ________________.

Accepted Answer

The answer of All microorganisms that live on or within...

Question 20

When the diet of a ruminant is drastically changed from grass to a starch rich diet,the ruminant may become very ill or die because:

Accepted Answer

A)  the microbes in the rumen cannot break down starch. 
B)  of the production of large amounts of acid, resulting in acidosis. 
C)  they lack a source of protein. 
D)  they are unable to regurgitate the starch as cud. 
E)  the starch is broken down very slowly and the rumen becomes clogged. 
A)  the microbes in the rumen cannot break down starch. 
B)  of the production of large amounts of acid, resulting in acidosis. 
C)  they lack a source of protein. 
D)  they are unable to regurgitate the starch as cud. 
E)  the starch is broken down very slowly and the rumen becomes clogged.

Exam 17: Microbial Symbionts

The type of symbiotic relationship in which one member benefits and the other member is not affected is called _________________.

Most microbe-host relationships are harmful.

The nitrogenase enzyme is irreversibly inactivated by hydrogen.

What is an endophyte?

The hydrogen and carbon dioxide produced in the gut of the lower termite are used to produce __________ by symbiotic microbes.

The mycobiont of a lichen receives sugars from the photobiont as a benefit from this relationship while the photobiont receives _______________ from the mycobiont as a benefit.

Hindgut fermenters have greater fermentation efficiency than ruminants.

Herbivores require microorganisms to help them with the digestion of this compound.

Scientists are able to make an insect symbiont free by this method.

Intestinal microorganisms are important for the proper functioning of the immune system.

Lower termites feed primarily on wood and contain symbiotic:

Endophytes are microorganisms that live within the tissue of ___________.

The human colon contains more microbial cells than human cells that make up the entire body.

How do termites obtain nitrogen in their diet?

Which of these is the MOST abundant bacterial group in the colon?

Which of these is true of a mutualistic relationship?

What is the human microbiome composed of?

The red color of plant root nodules is due to this oxygen binding protein.

All microorganisms that live on or within the human body are referred to collectively as the human ________________.

When the diet of a ruminant is drastically changed from grass to a starch rich diet,the ruminant may become very ill or die because:

The Microbial World

Bacteria

Eukaryal Microbes

Archaea

Viruses

Cultivating Microorganisms

DNA Replication and Gene Expression

Viral Replication Strategies

Bacterial Genetic Analysis

Microbial Genomics

Regulation of Gene Expression

Microbial Biotechnology

Metabolism

Biogeochemical Cycles

Microbial Ecosystems

The Microbiology of Food and Water

Introduction to Infectious Diseases

Innate Host Defenses Against Microbial Invasion

Adaptive Immunity

Survival in the Host

Viral Pathogenesis

Eukaryal Microbe Pathogenesis

Control of Infectious Diseases

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