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Demystifying Anaerobic Respiration: A Problem-Solving Exercise

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Title: Demystifying Anaerobic Respiration: A Problem-Solving Exercise
Language: English
Authors: Tomas Linder (ORCID 0000-0001-5365-0494)
Source: Journal of Microbiology & Biology Education. 2024 25(3).
Availability: American Society for Microbiology. 1752 N Street NW, Washington, DC 20036. Tel: 202-737-3600; e-mail: journals@asmusa.org; Web site: https://journals.asm.org/journal/jmbe
Peer Reviewed: Y
Page Count: 5
Publication Date: 2024
Document Type: Journal Articles
Reports - Descriptive
Education Level: Higher Education
Postsecondary Education
Descriptors: Science Education, Undergraduate Study, College Science, Scientific Concepts, Problem Solving, Chemistry, Active Learning, Metabolism, Thermodynamics
ISSN: 1935-7877
1935-7885
Abstract: Anaerobic respiration reactions are of fundamental importance to global biogeochemical cycling of elements. Yet, the idea that cellular respiration can occur not only in the absence of oxygen but also involve the oxidation of inorganic substrates (e.g., AsO[subscript 3 superscript 3-], Fe[superscript 2+], H[subscript 2], H[subscript 2]S, Mn[superscript 2+], NH[subscript 3], and S[superscript 0]) is often foreign to many undergraduate students. This article describes a problem-solving exercise where students are introduced to the thermodynamic fundamentals of respiration with a particular focus on the role of redox (reduction-oxidation) potentials (E[subscript 0]'). In the exercise, the students investigate how the difference in redox potential ([delta]E[subscript 0]') between different pairs of reductants and oxidants affects the range of permissible microbial metabolic reactions in natural environments when oxygen is absent.
Abstractor: As Provided
Entry Date: 2024
Accession Number: EJ1453372
Database: ERIC
FullText Text:
  Availability: 0
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  Data: American Society for Microbiology. 1752 N Street NW, Washington, DC 20036. Tel: 202-737-3600; e-mail: journals@asmusa.org; Web site: https://journals.asm.org/journal/jmbe
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  Data: Anaerobic respiration reactions are of fundamental importance to global biogeochemical cycling of elements. Yet, the idea that cellular respiration can occur not only in the absence of oxygen but also involve the oxidation of inorganic substrates (e.g., AsO[subscript 3 superscript 3-], Fe[superscript 2+], H[subscript 2], H[subscript 2]S, Mn[superscript 2+], NH[subscript 3], and S[superscript 0]) is often foreign to many undergraduate students. This article describes a problem-solving exercise where students are introduced to the thermodynamic fundamentals of respiration with a particular focus on the role of redox (reduction-oxidation) potentials (E[subscript 0]'). In the exercise, the students investigate how the difference in redox potential ([delta]E[subscript 0]') between different pairs of reductants and oxidants affects the range of permissible microbial metabolic reactions in natural environments when oxygen is absent.
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