Brock Biology of Microorganisms (14th Edition)
14th Edition
ISBN: 9780321897398
Author: Michael T. Madigan, John M. Martinko, Kelly S. Bender, Daniel H. Buckley, David A. Stahl, Thomas Brock
Publisher: PEARSON
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Textbook Question
Chapter 20.5, Problem 3MQ
Why is excreted organic matter important to many iron oxidizers?
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Chapter 20 Solutions
Brock Biology of Microorganisms (14th Edition)
Ch. 20.1 - How is new organic matter made in nature?Ch. 20.1 - In what ways are oxygenic photosynthesis and...Ch. 20.1 - What is a methane hydrate?Ch. 20.2 - Why does Syntrophomonas need a partner organism in...Ch. 20.2 - Prob. 2MQCh. 20.2 - What is the final product of acetogenesis?Ch. 20.3 - What is nitrogen fixation and why is it important...Ch. 20.3 - Prob. 2MQCh. 20.3 - How does the compound nitrapyrin benefit both...Ch. 20.4 - Is H2S a substrate or a product of the...
Ch. 20.4 - Prob. 2MQCh. 20.4 - Prob. 3MQCh. 20.5 - In what oxidation state is Fe in Fe(OH)3? In FeS?...Ch. 20.5 - Prob. 2MQCh. 20.5 - Why is excreted organic matter important to many...Ch. 20.6 - How does the formation of CaCO3 skeletons by...Ch. 20.6 - Prob. 2MQCh. 20.7 - What forms of mercury are most toxic to organisms?Ch. 20.7 - Prob. 2MQCh. 20.8 - What is the greenhouse effect and what causes it?Ch. 20.8 - What is the fate of most nitrogen used in...Ch. 20.8 - Why are the OMZs expanding and what are the likely...Ch. 20 - Prob. 1RQCh. 20 - Prob. 2RQCh. 20 - The principal form of nitrogen on Earth is N2,...Ch. 20 - Prob. 4RQCh. 20 - Prob. 5RQCh. 20 - Prob. 6RQCh. 20 - Prob. 7RQCh. 20 - Prob. 8RQCh. 20 - Compare and contrast the carbon, sulfur, and...Ch. 20 - 14C-labeled cellulose is added to a vial...Ch. 20 - Prob. 3AQ
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- Why would sulfur-oxidizing bacteria store sulfur? +arrow_forwardwhat does a negative result mean in an oxidase test?Select all that applies a)The bacteria may undergo anaerobic respiration b)The bacteria may have a cytochrome C oxidase c)The bacteria may undergo aerobic respiration d)The bacteria will not have cytochrome C oxidase e)None of the anwers are correctarrow_forwardWhat are the possible types of respiration that oxidase-positive samples might be capable of? Oxidase-negative?arrow_forward
- Are all organisms with oxidative respitory pathways necessarily strict aerobes? Explain.arrow_forwardIs H2S a substrate or a product of the sulfate-reducing bacteria?Of the chemolithotrophic sulfur bacteria?arrow_forwardWhat is the difference between assimilatory nitrate reduction and denitrification? Which reaction is performed by many microbes, and which is a more specialized metabolic capability?arrow_forward
- You have discovered a new microorganism that oxidizes ammonia. How will you determine if this microbe is a thaumarchaeote or a bacterium?arrow_forwardA chemolithoautotroph is respiring using only iron (Fe3+) and nitrite (NO2-). This bacterium does not consume organic molecules. How does this organism make proton motive force?arrow_forwardUsing a textbook or a reputable internet source, find two Gram-positive pathogenic bacteria and two Gram-negative pathogenic bacteria that may be classified as being facultative anaerobes. What tissues or organs do these bacteria target in the human patient? Why is it to their advantage to be able to use either aerobic respiration or anaerobic respiration/fermentation?arrow_forward
- Hydrogen Sulfide Productionarrow_forwardA chemolithoautotroph is respiring using only iron (Fe3+) and nitrite (NO2-). This bacterium does not consume organic molecules. From where does this organism obtain its carbon?arrow_forwardWrite the complete redox reactions for the following microbial metabolisms. Give an example of a type of environment where such bacteria may thrive (will there be plentiful O2? Organics-rich sediment? mineral-bearing rock formations etc?) Oxidation of glucose (C6H12O6) by sulfate (H2SO4) reducers (redox products are CO2 and H2S). Oxidation of ferrous hydroxide (Fe(OH)2) by iron-oxidizing bacteria in oxygen (O2)-rich environment. Redox products are Fe(OH)3 and H2 Please write all redox reactions correctly and explain! Thanks!arrow_forward
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