Question 1

Agar is a complex polysaccharide that comes from a/an ______.

Accepted Answer

A)   bacterium
B)   algae
C)   fungus
D)   marine invertebrate
E)   green plantF) None of the above
G) A) and D)

Question 2

The simple microscopes used by the earliest practitioners of microscopy contained which of the following?

Accepted Answer

A)   Magnifying lens
B)   Oil-immersion lens
C)   Lamp
D)   Ocular
E)   CondenserF) C) and D)
G) None of the above

Question 3

Which of the following parts of a microscope magnifies the specimen to produce a real image of the specimen?

Accepted Answer

A)   Body
B)   Condenser
C)   Objective lens
D)   Ocular lens
E)   NosepieceF) C) and E)
G) A) and B)

Question 4

Which of the following parts of the microscope magnifies the specimen to produce the virtual image of the specimen?

Accepted Answer

A)   Ocular lens
B)   Objective lens
C)   Condenser
D)   BodyE) C) and D)
F) B) and D)

Question 5

The bending of light rays as they pass from one medium to another is called refraction.

Accepted Answer

A) True 
 B)False

Question 6

A microbiologist inoculates Staphylococcus epidermidis and Escherichia coli into a culture medium.Following incubation,only the E.coli grows in the culture.What is the most likely explanation?

Accepted Answer

A)  The culture medium was selective.
B)  The culture medium was differential.
C)  The microbiologist used too much inoculum.
D)  The culture was contaminated.
E)  The incubation temperature was incorrect.F) C) and D)
G) A) and E)

Question 7

Agar is an important component of media because

Accepted Answer

A)   agar provides a solid surface for bacterial growth.
B)   bacteria require agar as a source of carbon.
C)   agar inhibits mold growth.
D)   agar prevents contamination.E) C) and D)
F) None of the above

Question 8

The three physical forms of laboratory media are ______.

Accepted Answer

A)   solid, semisolid, and liquid
B)   reducing, transport, and enumeration
C)   a streak plate, a pour plate, and a broth
D)   solid, liquid, and gasE) A) and C)
F) None of the above

Question 9

A pure culture contains

Accepted Answer

A)   only bacteria.
B)   only one identified species of microorganism.
C)   a variety of species from the same genus.
D)   microbes from a single source.E) B) and D)
F) All of the above

Question 10

The correct microbiological term for the sample of specimen that is put into a nutrient medium to produce a culture is ______.

Accepted Answer

A)   loop
B)   inoculum
C)   streak
D)   colonyE) B) and C)
F) A) and D)

Question 11

Bacterial cultures are easily identified from their microscopic appearance.

Accepted Answer

A) True 
 B)False

Question 12

All of the following are examples of different types of microbiological media except ______.

Accepted Answer

A)   agar
B)   enriched
C)   broth
D)   Petri dish
E)   semisolidF) B) and E)
G) A) and B)

Question 13

A reducing medium is used to culture ______ organisms.

Accepted Answer

A)   fastidious
B)   pathogenic
C)   anaerobic
D)   aerobicE) All of the above
F) A) and D)

Question 14

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

Accepted Answer

A)   Electron
B)   Dark-field
C)   Phase-contrast
D)   Bright-field
E)   FluorescenceF) A) and B)
G) A) and C)

Question 15

Which isolation technique is most effective for the majority of applications and is most commonly used for colony isolation in the laboratory?

Accepted Answer

A)   Spread plate
B)   Streak plate
C)   Pour plate
D)   Culture plate
E)   Loop dilutionF) A) and C)
G) B) and C)

Exam 3: Tools of the Laboratory: Methods for the Culturing of Microscopic Analysis of Microorganisms

A microbiologist inoculates Staphylococcus epidermidis and Escherichia coli into a culture medium.Following incubation,only the E.coli grows in the culture.What is the most likely explanation?

Correct Answer
verified

Which of the following parts of a microscope magnifies the specimen to produce a real image of the specimen?

Correct Answer
verified

The three physical forms of laboratory media are ______.

Correct Answer
verified

The bending of light rays as they pass from one medium to another is called refraction.

Correct Answer
verified

The correct microbiological term for the sample of specimen that is put into a nutrient medium to produce a culture is ______.

Correct Answer
verified

Which isolation technique is most effective for the majority of applications and is most commonly used for colony isolation in the laboratory?

Correct Answer
verified

A reducing medium is used to culture ______ organisms.

Correct Answer
verified

Agar is a complex polysaccharide that comes from a/an ______.

Correct Answer
verified

Bacterial cultures are easily identified from their microscopic appearance.

Correct Answer
verified

Agar is an important component of media because

Correct Answer
verified

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

Correct Answer
verified

Which of the following parts of the microscope magnifies the specimen to produce the virtual image of the specimen?

Correct Answer
verified

The simple microscopes used by the earliest practitioners of microscopy contained which of the following?

Correct Answer
verified

A pure culture contains

Correct Answer
verified

All of the following are examples of different types of microbiological media except ______.

Correct Answer
verified

Exam 3: Tools of the Laboratory: Methods for the Culturing of Microscopic Analysis of Microorganisms

A microbiologist inoculates Staphylococcus epidermidis and Escherichia coli into a culture medium.Following incubation,only the E.coli grows in the culture.What is the most likely explanation?

Correct AnswerverifiedShow Answer

Which of the following parts of a microscope magnifies the specimen to produce a real image of the specimen?

Correct AnswerverifiedShow Answer

The three physical forms of laboratory media are ______.

Correct AnswerverifiedShow Answer

The bending of light rays as they pass from one medium to another is called refraction.

Correct AnswerverifiedShow Answer

The correct microbiological term for the sample of specimen that is put into a nutrient medium to produce a culture is ______.

Correct AnswerverifiedShow Answer

Which isolation technique is most effective for the majority of applications and is most commonly used for colony isolation in the laboratory?

Correct AnswerverifiedShow Answer

A reducing medium is used to culture ______ organisms.

Correct AnswerverifiedShow Answer

Agar is a complex polysaccharide that comes from a/an ______.

Correct AnswerverifiedShow Answer

Bacterial cultures are easily identified from their microscopic appearance.

Correct AnswerverifiedShow Answer

Agar is an important component of media because

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following parts of the microscope magnifies the specimen to produce the virtual image of the specimen?

Correct AnswerverifiedShow Answer

The simple microscopes used by the earliest practitioners of microscopy contained which of the following?

Correct AnswerverifiedShow Answer

A pure culture contains

Correct AnswerverifiedShow Answer

All of the following are examples of different types of microbiological media except ______.

Correct AnswerverifiedShow Answer

Correct Answer
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