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 8
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
Verified step by step guidance1
Step 1: Understand the key terms: Magnification is the ability of a microscope to enlarge the image of a specimen, while resolution is the ability to distinguish two close points as separate entities. Both are critical for detailed observation.
Step 2: Review the characteristics of each microscope type: Bright-field microscopes use simple light transmission and generally have lower resolution and magnification compared to advanced types. Dark-field microscopes enhance contrast by scattering light but do not significantly improve resolution beyond bright-field.
Step 3: Consider phase-contrast microscopes, which improve contrast in transparent specimens by converting phase shifts in light passing through the specimen into brightness changes, but their resolution is similar to bright-field microscopes.
Step 4: Examine confocal microscopes, which use laser light and optical sectioning to produce high-resolution images with greater magnification and improved contrast by eliminating out-of-focus light, resulting in superior resolution compared to the other types.
Step 5: Conclude that the microscope combining the greatest magnification with the best resolution is the confocal microscope, due to its advanced optical technology and laser scanning capabilities.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Microscope Magnification
Magnification refers to how much larger a microscope can make an object appear compared to its actual size. Higher magnification allows viewing smaller details, but it must be paired with good resolution to be useful.
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Components & Magnification of the Compound Light Microscope
Microscope Resolution
Resolution is the ability of a microscope to distinguish two close points as separate. Better resolution provides clearer, more detailed images, which is crucial for accurately observing microscopic structures.
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Types of Light Microscopes
Different light microscopes use various techniques to enhance image quality: bright-field uses simple illumination, dark-field enhances contrast by scattering light, phase-contrast improves contrast in transparent samples, and confocal uses laser scanning for high resolution and magnification.
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Related Practice
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
In the binomial system of nomenclature, which term is always written in lowercase letters?
a. Kingdom
b. Domain
c. Genus
d. 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 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
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