Textbook Question
Negative stains such as eosin are also called _______.
a. Capsule stains
b. Endospore stains
c. Simple stains
d. Acid-fast stains
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Ch. 4 - Microscopy, Staining, and Classification
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302
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Table of contents
- Ch. 1 - A Brief History of Microbiology31
- Ch. 2 - The Chemistry of Microbiology28
- Ch. 3 - Cell Structure and Function39
- Ch. 4 - Microscopy, Staining, and Classification25
- Ch. 5 - Microbial Metabolism51
- Ch. 6 - Microbial Nutrition and Growth37
- Ch. 7 - Microbial Genetics51
- Ch. 8 - Recombinant DNA Technology21
- Ch. 9 - Controlling Microbial Growth in the Environment36
- Ch. 10 - Controlling Microbial Growth in the Body: Antimicrobial Drugs21
- Ch. 11 - Characterizing and Classifying Prokaryotes29
- Ch. 12 - Characterizing and Classifying Eukaryotes34
- Ch. 13 - Characterizing and Classifying Viruses, Viroids, and Prions23
- Ch. 14 - Infection, Infectious Diseases, and Epidemiology35
- Ch. 15 - Innate Immunity34
- Ch. 16 - Adaptive Immunity21
- Ch. 17 - Immunization and Immune Testing29
- Ch. 18 - Immune Disorders22
- Ch. 19 - Pathogenic Gram-Positive Bacteria25
- Ch. 20 - Pathogenic Gram-Negative Cocci and Bacilli28
- Ch. 21 - Rickettsias, Chlamydias, Spirochetes, and Vibrios25
- Ch. 22 - Pathogenic Fungi47
- Ch. 23 - Parasitic Protozoa, Helminths, and Arthropod Vectors44
- Ch. 24 - Pathogenic DNA Viruses23
- Ch. 25 - Pathogenic RNA Viruses30
- Ch. 26 - Applied and Industrial Microbiology29
- Ch. 27 - Microbial Ecology and Microbiomes22
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302Not the one you use?Change textbook
Chapter 4, Problem 7
Which of the following types of microscopes produces a three- dimensional image with a shadowed appearance?
a. Simple microscope
b. Differential interference contrast microscope
c. Fluorescence microscope
d. Transmission electron microscope
Verified step by step guidance1
Understand the characteristics of each microscope type listed in the options.
Recall that a simple microscope uses a single lens and produces a two-dimensional image, so it does not create a three-dimensional shadowed appearance.
Know that a differential interference contrast (DIC) microscope enhances contrast in unstained, transparent samples by using polarized light, producing images with a three-dimensional, shadowed effect.
Recognize that a fluorescence microscope uses fluorescent dyes and light to produce bright images of specific structures, but these images are typically two-dimensional and do not have a shadowed, 3D appearance.
Understand that a transmission electron microscope (TEM) produces highly detailed two-dimensional images by transmitting electrons through thin specimens, not three-dimensional shadowed images.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Differential Interference Contrast (DIC) Microscopy
DIC microscopy enhances contrast in unstained, transparent samples by using polarized light and optical modifications to produce images with a three-dimensional, shadowed appearance. This technique highlights differences in refractive index, making cellular structures appear with depth and texture.
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02:03
Differential Interference Contrast (DIC) Microscopy
Types of Microscopes and Their Imaging Techniques
Microscopes vary in how they generate images: simple microscopes use a single lens, fluorescence microscopes detect emitted light from fluorescent tags, and transmission electron microscopes (TEM) use electron beams to produce high-resolution 2D images. Understanding these differences helps identify which microscope produces 3D shadowed images.
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05:32Reviewing the Different Types of Microscopes
Three-Dimensional Imaging in Microscopy
3D imaging in microscopy refers to techniques that provide depth perception and spatial information about the sample. Methods like DIC and confocal microscopy create images with apparent depth, unlike traditional 2D imaging, allowing better visualization of surface structures and morphology.
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03:46Light Microscopy: Bright-Field Microscopes
Related Practice
Textbook Question
Which of the following microscopes combines the greatest magnification with the best resolution?
a. Confocal microscope
b. Phase-contrast microscope
c. Dark-field microscope
d. Bright-field microscope
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Textbook Question
An atomic force microscope can magnify a living cell, whereas electron microscopes and scanning tunneling microscopes cannot. What requirement of scanning tunneling microscopes precludes the imaging of living specimens?
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Textbook Question
Give three characteristics of a “specific epithet.”
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Textbook Question
How does the study of the nucleotide sequences of ribosomal RNA fit into a discussion of taxonomy?
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Textbook Question
Which of the following is different between light microscopy and transmission electron microscopy?
a. Magnification
b. Resolution
c. Wavelengths
d. All of the above
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