Question 1

Give a few reasons why living organisms may not be observed by transmission electron microscopy (TEM) or scanning electron microscopy (SEM).

Accepted Answer

In TEM, the specimens are fixed and embe

Question 2

Which type of microscopy is used to view the internal structures of a specimen?

Accepted Answer

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

Question 3

What is the total magnification of a light microscope when using a 25X ocular and 40X objective lens?

Accepted Answer

A)  15X 
B)  65X 
C)  400X 
D)  1,000X 
E)  1,200X 
A)  15X 
B)  65X 
C)  400X 
D)  1,000X 
E)  1,200X

Question 4

The highest useful magnification for a light microscope is about

Accepted Answer

A)  100X. 
B)  1,000X. 
C)  10,000X. 
D)  100,000X. 
E)  1,000,000X. 
A)  100X. 
B)  1,000X. 
C)  10,000X. 
D)  100,000X. 
E)  1,000,000X.

Question 5

Wavelength interference results in small observed objects (like bacteria) being surrounded by

Accepted Answer

A)  a capsule. 
B)  a membrane. 
C)  concentric rings. 
D)  a dark field. 
E)  a cell wall. 
A)  a capsule. 
B)  a membrane. 
C)  concentric rings. 
D)  a dark field. 
E)  a cell wall.

Question 6

Most electron micrographs in microbiology textbooks are in color. Is this normal for an electron micrograph? Why or why not?

Accepted Answer

Electron micrographs are not naturally c

Question 7

As lens strength increases, the light cone ________ and the lens must be ________ the object.

Accepted Answer

A)  narrows; nearer to 
B)  narrows; farther from 
C)  widens; nearer to 
D)  widens; farther from 
E)  widens; touching 
A)  narrows; nearer to 
B)  narrows; farther from 
C)  widens; nearer to 
D)  widens; farther from 
E)  widens; touching

Question 8

What molecule is shown below?

Accepted Answer

A)  GFP 
B)  FM4-64 
C)  DNA 
D)  RNA 
E)  DAPI 
A)  GFP 
B)  FM4-64 
C)  DNA 
D)  RNA 
E)  DAPI

Question 9

If your eyes had photoreceptors packed as closely as an eagle's (about eight times greater than humans), would you be able to resolve a virus (100 nm in size) using a light microscope? Why or why not?

Accepted Answer

No. Although your resolving power would

Give a few reasons why living organisms may not be observed by transmission electron microscopy (TEM) or scanning electron microscopy (SEM).

Which type of microscopy is used to view the internal structures of a specimen?

What is the total magnification of a light microscope when using a 25X ocular and 40X objective lens?

The highest useful magnification for a light microscope is about

Wavelength interference results in small observed objects (like bacteria) being surrounded by

Most electron micrographs in microbiology textbooks are in color. Is this normal for an electron micrograph? Why or why not?

As lens strength increases, the light cone and the lens must be the object.

What molecule is shown below?

If your eyes had photoreceptors packed as closely as an eagle's (about eight times greater than humans), would you be able to resolve a virus (100 nm in size) using a light microscope? Why or why not?

Microbial Life: Origin and Discovery

Cell Structure and Function

Bacterial Culture, Growth, and Development

Environmental Influences and Control of Microbial Growth

Viruses

Genomes and Chromosomes

Transcription, Translation, and Bioinformatics

Gene Transfer, Mutations, and Genome Evolution

Molecular Regulation

Viral Molecular Biology

Biotechniques and Synthetic Biology

Energetics and Catabolism

Electron Flow in Organotrophy, Lithotrophy, and Phototrophy

Biosynthesis

Food and Industrial Microbiology

Origins and Evolution

Bacterial Diversity

Archaeal Diversity

Eukaryotic Diversity

Microbial Ecology

Microbes in Global Elemental Cycles

Human Microbiota and Innate Immunity

The Adaptive Immune Response

Microbial Pathogenesis

Microbial Diseases

Antimicrobial Therapy

Clinical Microbiology and Epidemiology

Filters

Exam 2: Observing the Microbial Cell

Give a few reasons why living organisms may not be observed by transmission electron microscopy (TEM) or scanning electron microscopy (SEM).

Which type of microscopy is used to view the internal structures of a specimen?

What is the total magnification of a light microscope when using a 25X ocular and 40X objective lens?

The highest useful magnification for a light microscope is about

Wavelength interference results in small observed objects (like bacteria) being surrounded by

Most electron micrographs in microbiology textbooks are in color. Is this normal for an electron micrograph? Why or why not?

As lens strength increases, the light cone ________ and the lens must be ________ the object.

What molecule is shown below?

If your eyes had photoreceptors packed as closely as an eagle's (about eight times greater than humans), would you be able to resolve a virus (100 nm in size) using a light microscope? Why or why not?

Microbial Life: Origin and Discovery

Cell Structure and Function

Bacterial Culture, Growth, and Development

Environmental Influences and Control of Microbial Growth

Viruses

Genomes and Chromosomes

Transcription, Translation, and Bioinformatics

Gene Transfer, Mutations, and Genome Evolution

Molecular Regulation

Viral Molecular Biology

Biotechniques and Synthetic Biology

Energetics and Catabolism

Electron Flow in Organotrophy, Lithotrophy, and Phototrophy

Biosynthesis

Food and Industrial Microbiology

Origins and Evolution

Bacterial Diversity

Archaeal Diversity

Eukaryotic Diversity

Microbial Ecology

Microbes in Global Elemental Cycles

Human Microbiota and Innate Immunity

The Adaptive Immune Response

Microbial Pathogenesis

Microbial Diseases

Antimicrobial Therapy

Clinical Microbiology and Epidemiology

Filters

As lens strength increases, the light cone and the lens must be the object.