Question 1

If bacteria grow in a broth culture, the broth remains clear.

Accepted Answer

A) True 
 B)False  False

Question 2

Which of the following represents the pH values of acid?

Accepted Answer

A) 0 to 7 
B) 7 to 14 
C) 8 to 10 
D) 10 to 12 
A) 0 to 7 
B) 7 to 14 
C) 8 to 10 
D) 10 to 12 A

Question 3

A bacterium that survives at low pH is called:

Accepted Answer

A) acidic. 
B) anaerobic. 
C) aciduric. 
D) acidogenic. 
A) acidic. 
B) anaerobic. 
C) aciduric. 
D) acidogenic. C

Question 4

During the life cycle of a virus, what is the next step after the virus attaches to the host cell?

Accepted Answer

A) Uncoating 
B) Release 
C) Replication 
D) Enters the cell 
A) Uncoating 
B) Release 
C) Replication 
D) Enters the cell

Question 5

Viruses cause diseases in humans because they:

Accepted Answer

A) produce exotoxins. 
B) produce endotoxins. 
C) invade and kill or damage cells in our body. 
D) "swim" away from phagocytes using their flagella. 
A) produce exotoxins. 
B) produce endotoxins. 
C) invade and kill or damage cells in our body. 
D) "swim" away from phagocytes using their flagella.

Question 6

Those bacteria that die in the presence of oxygen are called:

Accepted Answer

A) aerobes. 
B) mesophiles. 
C) acidogens. 
D) anaerobes. 
A) aerobes. 
B) mesophiles. 
C) acidogens. 
D) anaerobes.

Question 7

Which of the following bacteria are important in metabolizing sugar to acids that cause dental caries?

Accepted Answer

A) Geobacillus stearothermophilus 
B) Bacillus atrophaeus 
C) Clostridium sporogenes 
D) Streptococcus mutans 
A) Geobacillus stearothermophilus 
B) Bacillus atrophaeus 
C) Clostridium sporogenes 
D) Streptococcus mutans

Question 8

Chlamydia and Rickettsia are examples of:

Accepted Answer

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

Question 9

Which of the following bacterial structures controls the flow of nutrients and waste into and out of the cell?

Accepted Answer

A) Cell wall 
B) Flagellum 
C) Cytoplasmic membrane 
D) Capsule 
A) Cell wall 
B) Flagellum 
C) Cytoplasmic membrane 
D) Capsule

Question 10

How are bacterial spores important in dental infection control?

Accepted Answer

A) They cause periodontal disease. 
B) They are used to monitor surface disinfection. 
C) They are used to test the functioning and use of sterilizers. 
D) They cause thrush. 
A) They cause periodontal disease. 
B) They are used to monitor surface disinfection. 
C) They are used to test the functioning and use of sterilizers. 
D) They cause thrush.

Question 11

Cocci are shaped like:

Accepted Answer

A) spheres. 
B) cylinders or rods. 
C) curved or spiral forms. 
D) flat disks. 
A) spheres. 
B) cylinders or rods. 
C) curved or spiral forms. 
D) flat disks.

Question 12

Obligate anaerobes grow best in the _____ of oxygen.

Accepted Answer

A) presence of large amounts 
B) presence of medium amounts 
C) presence of small amounts 
D) absence 
A) presence of large amounts 
B) presence of medium amounts 
C) presence of small amounts 
D) absence

Question 13

Regular bacteria, excluding Rickettsia and Chlamydia, multiply:

Accepted Answer

A) in the absence of nutrients. 
B) only when they are inside of living cells. 
C) when they are outside of living cells. 
D) only when the temperature is below 7° 
A) in the absence of nutrients. 
B) only when they are inside of living cells. 
C) when they are outside of living cells. 
D) only when the temperature is below 7°

Question 14

Viruses multiply:

Accepted Answer

A) in the absence of nutrients. 
B) only when they are inside of living cells. 
C) when they are outside of living cells. 
D) only when the temperature is below 7° 
A) in the absence of nutrients. 
B) only when they are inside of living cells. 
C) when they are outside of living cells. 
D) only when the temperature is below 7°

Question 15

Which of the following microbes is a yeast?

Accepted Answer

A) Streptococcus mutans 
B) Trichomonas vaginalis 
C) Candida albicans 
D) Staphylococcus aureus 
A) Streptococcus mutans 
B) Trichomonas vaginalis 
C) Candida albicans 
D) Staphylococcus aureus

Question 16

The main function of the bacterial cell wall is to:

Accepted Answer

A) protect against drying. 
B) protect against crushing. 
C) to control the exit of wastes from the cell. 
D) provide the cell with locomotion. 
A) protect against drying. 
B) protect against crushing. 
C) to control the exit of wastes from the cell. 
D) provide the cell with locomotion.

Question 17

Bacterial growth is defined as an increase in cell numbers.

Accepted Answer

A) True 
 B)False

Question 18

What is the result of a virus invading a host cell?

Accepted Answer

A) There is no effect on the cell. 
B) The virus always dies. 
C) The host cell always dies. 
D) The host cell may die or be damaged. 
A) There is no effect on the cell. 
B) The virus always dies. 
C) The host cell always dies. 
D) The host cell may die or be damaged.

Question 19

Which type of microbe is the most difficult to kill?

Accepted Answer

A) Endospores 
B) Vegetative bacteria 
C) Viruses 
D) Chlamydiae 
A) Endospores 
B) Vegetative bacteria 
C) Viruses 
D) Chlamydiae

Question 20

Which of the following bacterial structures interferes with phagocytosis?

Accepted Answer

A) Cell wall 
B) Flagellum 
C) Cytoplasmic membrane 
D) Capsule 
A) Cell wall 
B) Flagellum 
C) Cytoplasmic membrane 
D) Capsule

Exam 2: Characteristics of Microorganisms

If bacteria grow in a broth culture, the broth remains clear.

Which of the following represents the pH values of acid?

A bacterium that survives at low pH is called:

During the life cycle of a virus, what is the next step after the virus attaches to the host cell?

Viruses cause diseases in humans because they:

Those bacteria that die in the presence of oxygen are called:

Which of the following bacteria are important in metabolizing sugar to acids that cause dental caries?

Chlamydia and Rickettsia are examples of:

Which of the following bacterial structures controls the flow of nutrients and waste into and out of the cell?

How are bacterial spores important in dental infection control?

Cocci are shaped like:

Obligate anaerobes grow best in the _____ of oxygen.

Regular bacteria, excluding Rickettsia and Chlamydia, multiply:

Viruses multiply:

Which of the following microbes is a yeast?

The main function of the bacterial cell wall is to:

Bacterial growth is defined as an increase in cell numbers.

What is the result of a virus invading a host cell?

Which type of microbe is the most difficult to kill?

Which of the following bacterial structures interferes with phagocytosis?

Scope of Microbiology and Infection Control

Development of Infectious Diseases

Emerging Diseases

Oral Microbiology and Plaque-Associated Diseases

Bloodborne Pathogens

Oral and Respiratory Diseases

Infection Control Rationale and Regulations

Immunization

Hand Hygiene

Personal Protective Equipment

Instrument Processing

Surface and Equipment Asepsis

Dental Unit Water Asepsis and Air Quality

Aseptic Techniques

Laboratory and Radiographic Asepsis

Waste Management

Preventing Sharps Injuries

A Clinical Asepsis Protocol

General Office Safety and Asepsis

Greener Infection Control

Cross-Contamination Between Work and Home

About the Occupational Safety and Health Administration

Osha Inspections

Management of the Office Safety Program

Managing Chemicals Safely

Employee Fire Prevention and Emergency Action Plans

Infection Control Concerns During Remodeling or Construction

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