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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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
How does the study of the nucleotide sequences of ribosomal RNA fit into a discussion of taxonomy?
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Understand that taxonomy is the science of classifying organisms based on shared characteristics and evolutionary relationships.
Recognize that ribosomal RNA (rRNA) sequences are highly conserved genetic markers present in all living organisms, making them useful for comparing evolutionary relationships.
Learn that by studying the nucleotide sequences of rRNA, scientists can identify similarities and differences between organisms at the molecular level.
Use sequence comparison techniques, such as sequence alignment, to determine how closely related different organisms are based on their rRNA sequences.
Apply this molecular data to construct phylogenetic trees, which help classify organisms into groups that reflect their evolutionary history, thus integrating molecular evidence into taxonomy.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Ribosomal RNA (rRNA) Structure and Function
Ribosomal RNA is a fundamental component of the ribosome, essential for protein synthesis in all living cells. Its sequences are highly conserved across species, making rRNA an ideal molecular marker for studying evolutionary relationships and taxonomy.
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Structure of Prokaryotic Ribosomes
Molecular Phylogenetics and Taxonomy
Molecular phylogenetics uses genetic information, such as rRNA sequences, to infer evolutionary relationships among organisms. By comparing these sequences, scientists can classify organisms more accurately and construct phylogenetic trees that reflect shared ancestry.
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Conserved and Variable Regions in rRNA Genes
rRNA genes contain both conserved regions, which remain similar across species, and variable regions, which differ and provide species-specific signatures. Analyzing these regions helps distinguish between closely related organisms and supports taxonomic classification.
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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
Give three characteristics of a “specific epithet.”
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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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Textbook Question
Which of the following factors is important in making an image appear larger?
a. Thickness of the lens
b. Curvature of the lens
c. Speed of the light passing through the lens
d. All of the above
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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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