Question 1

Animals that lack CXCR4 and CCR5 proteins are immune to HIV infection.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following is the dominate genera of skin microflora?

Accepted Answer

A) Bacteriodes 
B) Firmicutes 
C) Actinobacteria 
D) Proteobacteria 
A) Bacteriodes 
B) Firmicutes 
C) Actinobacteria 
D) Proteobacteria

Question 3

Protists are NOT normally found in the gastrointestinal tract of healthy individuals.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following does NOT affect pathogen growth?

Accepted Answer

A) availability of microbial nutrients 
B) pH 
C) temperature 
D) doubling time 
A) availability of microbial nutrients 
B) pH 
C) temperature 
D) doubling time

Question 5

Capsules are particularly important for

Accepted Answer

A) making bacteria more vulnerable to host defense mechanisms. 
B) making bacteria less pathogenic. 
C) protecting bacteria from host defense mechanisms. 
D) allowing bacteria to become more phagocytic. 
A) making bacteria more vulnerable to host defense mechanisms. 
B) making bacteria less pathogenic. 
C) protecting bacteria from host defense mechanisms. 
D) allowing bacteria to become more phagocytic.

Question 6

Bacteria make up about one-third the weight of fecal matter.

Accepted Answer

A) True 
 B)False

Question 7

Design an experiment to determine whether a potential pathogen produces hemolysins.

Accepted Answer

Bacterial production of hemolysins is de

Question 8

How do dental lactic acid bacteria cause dental caries?

Accepted Answer

Lactic acid bacteria ferment sugars in t

Question 9

Which of the following is an important factor in the development of dental caries?

Accepted Answer

A) high salt diet 
B) high sugar diet 
C) high acid diet 
D) low salt diet 
A) high salt diet 
B) high sugar diet 
C) high acid diet 
D) low salt diet

Question 10

________ in saliva cleaves glycosidic linkages in peptidoglycan present in bacterial cell walls,weakening the wall and causing cell lysis.

Accepted Answer

A) Mucus 
B) Lysozyme 
C) Fibrin 
D) Lipid A 
A) Mucus 
B) Lysozyme 
C) Fibrin 
D) Lipid A

Question 11

Streptococcus mutans can produce dextran when sucrose is present in the absence of the enzyme dextransucrase.

Accepted Answer

A) True 
 B)False

Question 12

Endotoxins are released in large amounts only when cells lyse.

Accepted Answer

A) True 
 B)False

Question 13

The spread of pathogens through the blood and lymph systems that results in a bloodborne systemic infection is called

Accepted Answer

A) bacteremia. 
B) cancer. 
C) pathogenesis. 
D) septicemia. 
A) bacteremia. 
B) cancer. 
C) pathogenesis. 
D) septicemia.

Question 14

The process by which white blood cells ingest and kill bacteria is called

Accepted Answer

A) exocytosis. 
B) transcription. 
C) phagocytosis. 
D) translation. 
A) exocytosis. 
B) transcription. 
C) phagocytosis. 
D) translation.

Question 15

Which of the following environmental and host factors influence the composition of resident microflora on the skin?

Accepted Answer

A) age 
B) personal hygiene 
C) weather 
D) age,personal hygiene,and weather 
A) age 
B) personal hygiene 
C) weather 
D) age,personal hygiene,and weather

Question 16

Normal microflora are usually found in the blood,lymph,and nervous systems of the body.

Accepted Answer

A) True 
 B)False

Question 17

Streptocoocus pyogens utilizes M protein and ________ to form microfibrils that facilitate attachment to host cells.

Accepted Answer

A) lipoteichoic acid 
B) mucus 
C) plaque 
D) None of the answers are correct. 
A) lipoteichoic acid 
B) mucus 
C) plaque 
D) None of the answers are correct.

Question 18

One microenvironment of the skin is an area where glands produce an oily substance called

Accepted Answer

A) mucus. 
B) sebum. 
C) fimbrae. 
D) lipid A. 
A) mucus. 
B) sebum. 
C) fimbrae. 
D) lipid A.

Question 19

Why does Neisseria gonorrhea adhere only to mucosal epithelial cells in the genitourinary tract,eye,rectum,and throat?

Accepted Answer

N.gonorrhea has a surface prot

Question 20

Why are some microorganisms specialized to only certain parts of the body? Describe an example that supports your answer.

Accepted Answer

Each organ differs chemically

Exam 23: Microbial Interactions With Humans

Animals that lack CXCR4 and CCR5 proteins are immune to HIV infection.

Which of the following is the dominate genera of skin microflora?

Protists are NOT normally found in the gastrointestinal tract of healthy individuals.

Which of the following does NOT affect pathogen growth?

Capsules are particularly important for

Bacteria make up about one-third the weight of fecal matter.

Design an experiment to determine whether a potential pathogen produces hemolysins.

How do dental lactic acid bacteria cause dental caries?

Which of the following is an important factor in the development of dental caries?

________ in saliva cleaves glycosidic linkages in peptidoglycan present in bacterial cell walls,weakening the wall and causing cell lysis.

Streptococcus mutans can produce dextran when sucrose is present in the absence of the enzyme dextransucrase.

Endotoxins are released in large amounts only when cells lyse.

The spread of pathogens through the blood and lymph systems that results in a bloodborne systemic infection is called

The process by which white blood cells ingest and kill bacteria is called

Which of the following environmental and host factors influence the composition of resident microflora on the skin?

Normal microflora are usually found in the blood,lymph,and nervous systems of the body.

Streptocoocus pyogens utilizes M protein and ________ to form microfibrils that facilitate attachment to host cells.

One microenvironment of the skin is an area where glands produce an oily substance called

Why does Neisseria gonorrhea adhere only to mucosal epithelial cells in the genitourinary tract,eye,rectum,and throat?

Why are some microorganisms specialized to only certain parts of the body? Describe an example that supports your answer.

Microorganisms and Microbiology

Microbial Cell Structure and Function

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Molecular Biology

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Genetics of Bacteria and Archaea

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Functional Diversity of Bacteria

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Diversity of Eukaryotic Microorganisms

Methods in Microbial Ecology

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Molecular Immunology

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Person-To-Person Bacterial and Viral Diseases

Vectorborne and Soilborne Bacterial and Viral Diseases

Water and Food As Vehicles of Bacterial Diseases

Eukaryotic Pathogens: Fungal and Parasitic Diseases

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