Textbook Question
A student observes a researcher streaking a plate numerous times, flaming the loop between streaks. The researcher is likely using the ___________ method to isolate microorganisms.
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Ch. 6 - Microbial Nutrition and Growth
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 6, Problem 11
Chemolithotrophs acquire electrons from (organic/inorganic)___________ compounds.
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Understand the definition of chemolithotrophs: these are organisms that obtain energy by oxidizing inorganic compounds.
Recall that chemolithotrophs use inorganic substances as their electron donors, unlike chemoorganotrophs which use organic compounds.
Identify common inorganic electron donors for chemolithotrophs, such as hydrogen sulfide (H\_2S), ammonia (NH\_3), ferrous iron (Fe\^{2+}), or hydrogen gas (H\_2).
Conclude that chemolithotrophs acquire electrons from inorganic compounds, not organic ones.
Therefore, fill in the blank with the word 'inorganic' to correctly complete the statement.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Chemolithotrophy
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic compounds. Unlike chemoorganotrophs, they do not rely on organic molecules for electrons but instead use inorganic substances such as hydrogen sulfide, ammonia, or ferrous iron.
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Nutritional Diversity Among Microbes
Electron Donors in Microbial Metabolism
Electron donors are molecules that provide electrons during metabolic processes. In chemolithotrophs, these donors are inorganic compounds, which are oxidized to release electrons that enter the electron transport chain for energy production.
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Inorganic vs. Organic Compounds
Organic compounds contain carbon-hydrogen bonds and are typically used by heterotrophs as energy and electron sources. In contrast, inorganic compounds lack these bonds and include substances like minerals and gases, which chemolithotrophs utilize as electron donors.
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Related Practice
Textbook Question
A Coulter counter is a(n):
a. Statistical estimation using 15 dilution tubes and a table of numbers to estimate the number of bacteria per milliliter
b. Indirect method of counting microorganisms
c. Device that directly counts microbes as they pass through a tube in front of an electronic detector
d. Device that directly counts microbes that are differentially stained with fluorescent dyes
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Textbook Question
List five direct methods of counting microbes.
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Textbook Question
How does a chemostat maintain a constant population size?
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Textbook Question
Which of the following methods is best for counting fecal bacteria from a stream to determine the safety of the water for drinking?
a. Dry weight
b. Turbidity
c. Viable plate counts
d. Membrane filtration
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Textbook Question
Which of the following is most useful in representing population growth on a graph?
a. Logarithmic reproduction of the growth curve
b. A semilogarithmic graph using a log scale on the y-axis
c. An arithmetic graph of the lag phase followed by a logarithmic section for the log, stationary, and death phases
d. None of the above would best represent a population growth curve
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