Question 1

Endospores are involved in bacterial reproduction.

Accepted Answer

A) True 
 B)False

Question 2

In a basic staining procedure, which is the correct order?

Accepted Answer

A)  Fix, smear, stain 
B)  Smear, fix, stain 
C)  Fix, stain, decolorize 
D)  Smear, decolorize, stain 
E)  Smear, stain, fix 
A)  Fix, smear, stain 
B)  Smear, fix, stain 
C)  Fix, stain, decolorize 
D)  Smear, decolorize, stain 
E)  Smear, stain, fix

Question 3

An electron microscope must use electromagnet "lenses" shaped like donuts to direct the electrons onto the specimen. Why?

Accepted Answer

A)  Electrons are particles but there are other particles in air as well. Without a vacuum, the electrons would strike and be scattered by the particles within the air. 
B)  Electrons are highly radioactive, and the chamber must be completely sealed to prevent them from escaping and contaminating the lab area. 
C)  This is the method for fixing the specimen to the slide grid for an electron microscope. Without fixing the specimen by vacuum, it would slide off and we wouldn't be able to visualize it. 
D)  All of the answer choices are True. 
E)  None of the answer choices is True. 
A)  Electrons are particles but there are other particles in air as well. Without a vacuum, the electrons would strike and be scattered by the particles within the air. 
B)  Electrons are highly radioactive, and the chamber must be completely sealed to prevent them from escaping and contaminating the lab area. 
C)  This is the method for fixing the specimen to the slide grid for an electron microscope. Without fixing the specimen by vacuum, it would slide off and we wouldn't be able to visualize it. 
D)  All of the answer choices are True. 
E)  None of the answer choices is True.

Question 4

The microscope that allows the specimen to appear three-dimensional is the

Accepted Answer

A)  phase contrast microscope. 
B)  differential interference contrast microscope. 
C)  fluorescence microscope. 
D)  dark-field microscope. 
E)  compound microscope. 
A)  phase contrast microscope. 
B)  differential interference contrast microscope. 
C)  fluorescence microscope. 
D)  dark-field microscope. 
E)  compound microscope.

Question 5

Specimens can be observed at the atomic level using a(n)

Accepted Answer

A)  scanning electron microscope. 
B)  transmission electron microscope. 
C)  atomic force microscope. 
D)  fluorescence microscope. 
E)  light microscope. 
A)  scanning electron microscope. 
B)  transmission electron microscope. 
C)  atomic force microscope. 
D)  fluorescence microscope. 
E)  light microscope.

Question 6

The two magnifying lenses found in a light microscope are the

Accepted Answer

A)  basic and transverse. 
B)  small and large. 
C)  ocular and objective. 
D)  simple and phase. 
E)  ocular and phase. 
A)  basic and transverse. 
B)  small and large. 
C)  ocular and objective. 
D)  simple and phase. 
E)  ocular and phase.

Question 7

Smooth endoplasmic reticulum is involved in protein synthesis.

Accepted Answer

A) True 
 B)False

Question 8

Which is NOT True of the cytoplasmic membrane?

Accepted Answer

A)  It defines the boundaries of the cell. 
B)  It is a selectively permeable barrier. 
C)  It consists mainly of a fixed, static, phospholipid bilayer. 
D)  It contains proteins used as selective gates and sensors. 
E)  All of the answer choices are True. 
A)  It defines the boundaries of the cell. 
B)  It is a selectively permeable barrier. 
C)  It consists mainly of a fixed, static, phospholipid bilayer. 
D)  It contains proteins used as selective gates and sensors. 
E)  All of the answer choices are True.

Question 9

A patient comes to see you, complaining of a very sore throat. When you examine her, you find that she has a fever of 39S1U1P1oS1S1P0C, and you observe that her throat is extremely red, with pus on her tonsils. You swab the pus and make a slide, which you then send to the clinical lab for Gram staining. The lab sends back a report in which it is noted that the slide has many long chains of round cells that have stained purple in color.
-You inform the patient that the results of the Gram stain indicate to you that the bacteria in her throat are ________ in shape, and have a ________ cell wall.

Accepted Answer

A)  round; thin 
B)  cylindrical; thick 
C)  round; thick 
D)  spiral; thick 
E)  cylindrical; thin 
A)  round; thin 
B)  cylindrical; thick 
C)  round; thick 
D)  spiral; thick 
E)  cylindrical; thin

Question 10

The structures used for motility in both eukaryotes and prokaryotes are

Accepted Answer

A)  cilia. 
B)  flagella. 
C)  pili. 
D)  fimbriae. 
E)  microvilli. 
A)  cilia. 
B)  flagella. 
C)  pili. 
D)  fimbriae. 
E)  microvilli.

Question 11

Chemotaxis refers to

Accepted Answer

A)  movement toward light. 
B)  movement toward a chemical. 
C)  movement away from a chemical. 
D)  movement in response to a chemical. 
E)  movement of a chemical. 
A)  movement toward light. 
B)  movement toward a chemical. 
C)  movement away from a chemical. 
D)  movement in response to a chemical. 
E)  movement of a chemical.

Question 12

Which molecule(s) is (are) NOT associated with the cell wall of Gram-positive bacteria?

Accepted Answer

A)  Peptidoglycan 
B)  D-form amino acids 
C)  Teichoic acids 
D)  Peptidoglycan, D-form amino acids, AND teichoic acids 
E)  Lipopolysaccharide 
A)  Peptidoglycan 
B)  D-form amino acids 
C)  Teichoic acids 
D)  Peptidoglycan, D-form amino acids, AND teichoic acids 
E)  Lipopolysaccharide

Exam 3: Microscopy and Cell Structure

Endospores are involved in bacterial reproduction.

In a basic staining procedure, which is the correct order?

An electron microscope must use electromagnet "lenses" shaped like donuts to direct the electrons onto the specimen. Why?

The microscope that allows the specimen to appear three-dimensional is the

Specimens can be observed at the atomic level using a(n)

The two magnifying lenses found in a light microscope are the

Smooth endoplasmic reticulum is involved in protein synthesis.

Which is NOT True of the cytoplasmic membrane?

The structures used for motility in both eukaryotes and prokaryotes are

Chemotaxis refers to

Which molecule(s) is (are) NOT associated with the cell wall of Gram-positive bacteria?

Humans and the Microbial World

The Molecules of Life

Dynamics of Microbial Growth

Control of Microbial Growth

Microbial Metabolism: Fueling Cell Growth

The Blueprint of Life, from DNA to Protein

Bacterial Genetics

Biotechnology

Identifying and Classifying Microorganisms

The Diversity of Bacteria and Archaea

The Eukaryotic Members of the Microbial World

Viruses, Viroids, and Prions

The Innate Immune Response

The Adaptive Immune Response

Host-Microbe Interactions

Immunological Disorders

Applications of Immune Responses

Epidemiology

Antimicrobial Medications

Respiratory System Infections

Skin Infections

Wound Infections

Digestive System Infections

Blood and Lymphatic Infections

Nervous System Infections

Genitourinary Tract Infections

Microbial Ecology

Environmental Microbiology: Treatment of Water, Wastes, and Polluted Habitats

Food Microbiology

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