Question 1

A bacterial cell that is deposited on the surface of an appropriate solid growth media will divide repeatedly until it forms a visible accumulation of bacterial growth.This is known as a bacterial

Accepted Answer

A)  colony.
B)  community.
C)  biofilm.
D)  smear.E) None of the above
F) A) and C)

Question 2

Which microscope shows cells against a bright background and the intracellular structures of unstained cells based on their varying densities?

Accepted Answer

A)  bright-field
B)  dark-field
C)  phase-contrast
D)  fluorescence
E)  electronF) A) and B)
G) D) and E)

Question 3

All of the following are examples of basic dyes except

Accepted Answer

A)  methylene blue.
B)  nigrosin.
C)  crystal violet.
D)  safranin.
E)  carbol fuchsin.F) A) and B)
G) B) and C)

Question 4

All of the following are criteria that are used to classify different types of microbiological growth media EXCEPT

Accepted Answer

A)  physical state or consistency.
B)  purpose or function.
C)  chemical composition.
D)  sensory characteristics (color, smell) .E) None of the above
F) A) and C)

Question 5

Magnification is achieved in a compound microscope through the initial magnification of the specimen by the_____ lens.This image is then projected to the _____ lens that will further magnify the specimen to form a virtual image received by the eye.

Accepted Answer

The answer of Magnification is achieved in a compound microscope...

Question 6

Basic dyes are

Accepted Answer

A)  attracted to the acidic substances of bacterial cells.
B)  anionic.
C)  used in negative staining.
D)  repelled by cells.
E)  dyes such as India ink and nigrosin.F) C) and D)
G) A) and D)

Question 7

The procedure for culturing a microorganism requires the use of a microscope.

Accepted Answer

A) True 
 B)False

Question 8

All of the following are correct about agar except

Accepted Answer

A)  it is flexible.
B)  it melts at the boiling point of water (100°
C)  .
C)  it is a source of nutrition for bacteria.
D)  it solidifies below 42°C.
E)  it is solid at room temperature.F) C) and E)
G) A) and B)

Question 9

Some microbes are not capable of growing on artificial media.

Accepted Answer

A) True 
 B)False

Question 10

All of the following pertain to the fluorescence microscope except it

Accepted Answer

A)  uses electrons to produce a specimen image.
B)  is a type of compound microscope.
C)  requires the use of dyes like acridine and fluorescein.
D)  is commonly used to diagnose certain infections.
E)  requires an ultraviolet radiation source.F) A) and C)
G) All of the above

Question 11

The type of microscope in which you would see brightly illuminated specimens against a black background is

Accepted Answer

A)  bright-field.
B)  dark-field.
C)  phase-contrast.
D)  fluorescence.
E)  electron.F) A) and B)
G) A) and E)

Question 12

The primary purpose of staining cells on a microscope slide is to

Accepted Answer

A)  kill them.
B)  secure them to the slide.
C)  enlarge the cells.
D)  add contrast in order to see them better.
E)  see motility.F) C) and D)
G) A) and E)

Question 13

Observing and characterizing colonial growth for size, shape, edge, elevation, color, odor, and texture is part of ___.

Accepted Answer

A)  specimen collection
B)  inoculation
C)  incubation
D)  isolation
E)  inspectionF) C) and D)
G) A) and E)

Question 14

Explain how and why immersion oil increases resolution but not magnification when using the 100X objective.

Accepted Answer

Immersion oil increases resolution but n...

Question 15

Brain-heart infusion, trypticase soy agar (TSA) , and nutrient agar are all examples of which type of media?

Accepted Answer

A)  synthetic
B)  reducing
C)  enriched
D)  complex
E)  selectiveF) C) and E)
G) B) and D)

Question 16

Which microscope achieves the greatest resolution and highest magnification?

Accepted Answer

A)  bright-field
B)  dark-field
C)  phase-contrast
D)  fluorescence
E)  electronF) C) and D)
G) None of the above

Question 17

_____ is the term for a starting a new culture from an existing one.

Accepted Answer

The answer of _____ is the term for a starting...

Question 18

Which microscope does not use light in forming the specimen image?

Accepted Answer

A)  bright-field
B)  dark-field
C)  phase-contrast
D)  fluorescence
E)  electronF) A) and E)
G) B) and E)

Question 19

A medium that is gel-like has less agar in it compared to a solid medium.

Accepted Answer

A) True 
 B)False

Question 20

Mixed cultures are also referred to as contaminated cultures.

Accepted Answer

A) True 
 B)False

Exam 3: Tools of the Laboratory: Methods of Studying Microorganisms

_____ is the term for a starting a new culture from an existing one.

Correct AnswerverifiedShow Answer

Observing and characterizing colonial growth for size, shape, edge, elevation, color, odor, and texture is part of ___.

Correct AnswerverifiedShow Answer

A medium that is gel-like has less agar in it compared to a solid medium.

Correct AnswerverifiedShow Answer

All of the following are correct about agar except

Correct AnswerverifiedShow Answer

The procedure for culturing a microorganism requires the use of a microscope.

Correct AnswerverifiedShow Answer

Brain-heart infusion, trypticase soy agar (TSA) , and nutrient agar are all examples of which type of media?

Correct AnswerverifiedShow Answer

A bacterial cell that is deposited on the surface of an appropriate solid growth media will divide repeatedly until it forms a visible accumulation of bacterial growth.This is known as a bacterial

Correct AnswerverifiedShow Answer

All of the following pertain to the fluorescence microscope except it

Correct AnswerverifiedShow Answer

The type of microscope in which you would see brightly illuminated specimens against a black background is

Correct AnswerverifiedShow Answer

Which microscope achieves the greatest resolution and highest magnification?

Correct AnswerverifiedShow Answer

All of the following are criteria that are used to classify different types of microbiological growth media EXCEPT

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All of the following are examples of basic dyes except

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Some microbes are not capable of growing on artificial media.

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Mixed cultures are also referred to as contaminated cultures.

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The primary purpose of staining cells on a microscope slide is to

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Which microscope shows cells against a bright background and the intracellular structures of unstained cells based on their varying densities?

Correct AnswerverifiedShow Answer

Basic dyes are

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Which microscope does not use light in forming the specimen image?

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Magnification is achieved in a compound microscope through the initial magnification of the specimen by the_____ lens.This image is then projected to the _____ lens that will further magnify the specimen to form a virtual image received by the eye.

Correct AnswerverifiedShow Answer

Explain how and why immersion oil increases resolution but not magnification when using the 100X objective.

Correct AnswerAnswered by ExamLex AIImmersion oil increases resolution but n...View AnswerShow Answer

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Magnification is achieved in a compound microscope through the initial magnification of the specimen by the_ lens.This image is then projected to the _ lens that will further magnify the specimen to form a virtual image received by the eye.

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Immersion oil increases resolution but n...
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