Question 1

Which of the following is INCORRECT?

Accepted Answer

A)  Congo red is a negative stain. 
B)  Malachite green is an acid-fast stain. 
C)  Methylene blue is a simple stain. 
D)  Fluorophore is in an antibody stain. 
A)  Congo red is a negative stain. 
B)  Malachite green is an acid-fast stain. 
C)  Methylene blue is a simple stain. 
D)  Fluorophore is in an antibody stain.

Question 2

Which of the following is mismatched?

Accepted Answer

A)  darkfield microscopy-uses visible light 
B)  fluorescence microscopy-uses a fluorescent light 
C)  scanning electron microscopy-produces a three-dimensional image 
D)  compound light microscopy-produces a light image against a dark background 
A)  darkfield microscopy-uses visible light 
B)  fluorescence microscopy-uses a fluorescent light 
C)  scanning electron microscopy-produces a three-dimensional image 
D)  compound light microscopy-produces a light image against a dark background

Question 3

Using the figure below,which of the following images depicts the refraction of light?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 4

In the figure below,line "B" points to the microscope's

Accepted Answer

A)  ocular lens. 
B)  objective. 
C)  condenser. 
D)  light source. 
A)  ocular lens. 
B)  objective. 
C)  condenser. 
D)  light source.

Question 5

In the Gram stain,which step is critical in differentiating Gram-positive from Gram-negative cells?

Accepted Answer

A)  crystal violet 
B)  safranin 
C)  mordant 
D)  ethanol 
A)  crystal violet 
B)  safranin 
C)  mordant 
D)  ethanol

Question 6

Which microscope best allows the observation of internal cell structures in a natural state?

Accepted Answer

A)  compound light microscope 
B)  phase-contrast microscope 
C)  darkfield microscope 
D)  electron microscope 
A)  compound light microscope 
B)  phase-contrast microscope 
C)  darkfield microscope 
D)  electron microscope

Question 7

You are performing a Gram stain on Gram-positive bacteria and you stop after the addition of the counterstain.What is the appearance of the bacteria at this point?

Accepted Answer

A)  purple 
B)  colorless 
C)  pink 
D)  blue 
A)  purple 
B)  colorless 
C)  pink 
D)  blue

Question 8

Please label the figure below with different interactions of light with matter.Please describe what is happening with each interaction.

Accepted Answer

1.Absorption: Label light wave and heat

Question 9

Which of the following is powerful enough to visualize ribosomes?

Accepted Answer

A)  a compound light microscope 
B)  an electron microscope 
C)  a fluorescence microscope 
D)  a darkfield microscope 
A)  a compound light microscope 
B)  an electron microscope 
C)  a fluorescence microscope 
D)  a darkfield microscope

Question 10

Assume you stain Bacillus with malachite green with heat and then counterstain with safranin.What type of stain would you be performing?

Accepted Answer

A)  a differential and endospore stain 
B)  a differential and Gram stain 
C)  a simple and endospore stain 
D)  a simple and Gram stain 
A)  a differential and endospore stain 
B)  a differential and Gram stain 
C)  a simple and endospore stain 
D)  a simple and Gram stain

Question 11

Assume you stain Bacillus with malachite green with heat and then counterstain with safranin.Through the microscope,the green structures are

Accepted Answer

A)  cell walls. 
B)  capsules. 
C)  endospores. 
D)  bacteria. 
A)  cell walls. 
B)  capsules. 
C)  endospores. 
D)  bacteria.

Question 12

Which microscope is used to observe specific fluorescent-labeled structures?

Accepted Answer

A)  a compound light microscope 
B)  a phase-contrast microscope 
C)  a fluorescence microscope 
D)  an electron microscope 
A)  a compound light microscope 
B)  a phase-contrast microscope 
C)  a fluorescence microscope 
D)  an electron microscope

Question 13

Which of the following statements is correct?

Accepted Answer

A)  Safranin is a primary stain. 
B)  Iodine is a counterstain. 
C)  Ethanol is a decolorizer. 
D)  Crystal violet is a mordant. 
A)  Safranin is a primary stain. 
B)  Iodine is a counterstain. 
C)  Ethanol is a decolorizer. 
D)  Crystal violet is a mordant.

Question 14

Which of the following is FALSE concerning darkfield microscopy?

Accepted Answer

A)  Contamination in the medium can scatter light. 
B)  It can be used to identify spirochetes. 
C)  Images are dark against a light background. 
D)  High resolution cannot be achieved. 
A)  Contamination in the medium can scatter light. 
B)  It can be used to identify spirochetes. 
C)  Images are dark against a light background. 
D)  High resolution cannot be achieved.

Question 15

Bacteria that grow as rods are commonly referred to as ________,whereas bacteria that grow as spheres are known as ________.

Accepted Answer

The answer of Bacteria that grow as rods are commonly...

Question 16

A(n)________ microscopy microscope produces halos of bright lights against a dark field.

Accepted Answer

A)  compound light 
B)  electron 
C)  fluorescence 
D)  darkfield 
A)  compound light 
B)  electron 
C)  fluorescence 
D)  darkfield

Question 17

You complete a Gram stain on Gram-positive bacteria;however,you over-decolorize your sample.What color will your bacteria be at this point?

Accepted Answer

A)  purple 
B)  colorless 
C)  pink 
D)  blue 
A)  purple 
B)  colorless 
C)  pink 
D)  blue

Question 18

In the figure below,which depicts cocci in chains?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  none of the labeled areas 
A)  1 
B)  2 
C)  3 
D)  none of the labeled areas

Question 19

In the figure below,line "C" points to the microscope's

Accepted Answer

A)  ocular lens. 
B)  objective. 
C)  condenser. 
D)  light source. 
A)  ocular lens. 
B)  objective. 
C)  condenser. 
D)  light source.

Question 20

In an acid-fast stain,carbolfuchsin specifically stains ________ of Mycobaterium tuberculosis.

Accepted Answer

The answer of In an acid-fast stain,carbolfuchsin specifically stains ________...

Exam 3: Observing Microbes

Which of the following is INCORRECT?

Which of the following is mismatched?

Using the figure below,which of the following images depicts the refraction of light?

In the figure below,line "B" points to the microscope's

In the Gram stain,which step is critical in differentiating Gram-positive from Gram-negative cells?

Which microscope best allows the observation of internal cell structures in a natural state?

You are performing a Gram stain on Gram-positive bacteria and you stop after the addition of the counterstain.What is the appearance of the bacteria at this point?

Please label the figure below with different interactions of light with matter.Please describe what is happening with each interaction.

Which of the following is powerful enough to visualize ribosomes?

Assume you stain Bacillus with malachite green with heat and then counterstain with safranin.What type of stain would you be performing?

Assume you stain Bacillus with malachite green with heat and then counterstain with safranin.Through the microscope,the green structures are

Which microscope is used to observe specific fluorescent-labeled structures?

Which of the following statements is correct?

Which of the following is FALSE concerning darkfield microscopy?

Bacteria that grow as rods are commonly referred to as ________,whereas bacteria that grow as spheres are known as ________.

A(n)________ microscopy microscope produces halos of bright lights against a dark field.

You complete a Gram stain on Gram-positive bacteria;however,you over-decolorize your sample.What color will your bacteria be at this point?

In the figure below,which depicts cocci in chains?

In the figure below,line "C" points to the microscope's

In an acid-fast stain,carbolfuchsin specifically stains ________ of Mycobaterium tuberculosis.

Microbes Shape Our History

Basic Concepts of Infectious Disease

Living Chemistry: From Atoms to Cells

Cell Biology of Bacteria and Eukaryotes

Bacterial Growth, Nutrition, and Differentiation

Bacterial Metabolism

Bacterial Genetics and Biotechnology

Bacterial Genomes and Evolution

Bacterial Diversity

Eukaryotic Microbes and Invertebrate Infectious Agents

Viruses

Sterilization, Disinfection, and Antibiotic Therapy

Normal Human Microbiota: a Delicate Balance of Power

The Immune System: Inflammation and Innate Immunity

The Immune System: Adaptive Immunity

Immune Disorders, Tools, and Vaccines

Microbial Pathogenesis

Infections of the Skin and Eye

Infections of the Respiratory Tract

Systemic Infections

Infections of the Digestive System

Infections of the Urinary and Reproductive Tracts

Infections of the Central Nervous System

Diagnostic Clinical Microbiology

Epidemiology: Tracking Infectious Diseases

Environmental and Food Microbiology

Filters

Using the figure below,which of the following images depicts the refraction of light? $Using the figure below,which of the following images depicts the refraction of light?$

Bacteria that grow as rods are commonly referred to as ,whereas bacteria that grow as spheres are known as .