Question: The clear area with no bacterial growth around a disk containing an antimicrobial compound is referred to as:

Answer Choices:
No growth zone
Zone of inhibition
Death zone
Zone of resistance

Answer: Zone of inhibition

 

Question: Using the Kirby-Bauer antibiotic sensitivity test, a single plate can be used to determine:

Answer Choices:
The sensitivity of a particular bacterium to a number of different antibiotics
The sensitivity of many strains of bacteria to a number of different antibiotics
All of these
The sensitivity of many strains of bacteria to a single antibiotic

Answer: All of these

 

Question: What information does the Kirby-Bauer disk diffusion method provide?

Answer Choices:
The mode of action of an antibiotic
Types of allergic reactions a patient may exhibit
An microbe’s sensitivity and resistance to antibiotics
The origin of the antibiotic

Answer: An microbe’s sensitivity and resistance to antibiotics

 

Question: How is an antiseptic different from a disinfectant?

Answer Choices:
An antiseptic is used to remove or kill microorganisms IN the body, whereas a disinfectant is used to remove or kill microorganisms on the body surfaces.
There is essentially no difference and these terms can be used interchangeably.
An antiseptic kills or inactivates all microbial forms but a disinfectant does not destroy endospores.
An antiseptic is used to remove or kill microorganisms on tissue, whereas a disinfectant is used to remove or kill microorganisms on inanimate objects.

Answer: An antiseptic is used to remove or kill microorganisms on tissue, whereas a disinfectant is used to remove or kill microorganisms on inanimate objects.

 

Question: How are agar plates inoculated for disk diffusion testing of antimicrobial compounds?

Answer Choices:
A swab is used to inoculate the entire surface of the plate, producing a lawn of growth
A loop is used to prepare a 4-way quadrant streak
A series of serial dilutions is spread to achieve countable colonies
A four-way quadrant streak is done using a swab

Answer: A swab is used to inoculate the entire surface of the plate, producing a lawn of growth

 

Question: According to the results of the pillbug experiment,

Answer Choices:
Pillbugs tend to prefer sand over cornstarch
The results of the experiment did not allow me to draw any conclusions about pillbug preferences
Pillbugs prefer a wet environment
Pillbugs tend to prefer cornstarch over sand
Pillbugs did not show a preference when given a choice of substrate

Answer: Pillbugs tend to prefer cornstarch over sand

 

Question: Which of the following infectious agents is least likely to be damaged by UV exposure?

Answer Choices:
Protozoa
Viruses
Bacteria
Fungi
Prions

Answer: Prions

 

Question: Using the data in the table below, please choose the most accurate test result of Staphylococcus aureus with a zone of inhibition diameter of 22 around a Gentamicin disk.

Answer Choices:
Susceptible
Intermediate
Resistant

Answer: Susceptible

 

Question: Because it is categorized as a disinfectant, household-strength bleach is safe for topical application (on the skin).

Answer Choices:
True
False

Answer: False

 

Question: Place the 4 phases of Scientific method in the correct order: Hypothesis Report Analysis Experiment

Answer Choices:
2, 1, 4, 3
4, 2, 1, 3
2, 3, 4, 1
1, 2, 3, 4

Answer: 1, 4, 3, 2