Connect With Learnsmart Labs Online Access For Prescott's Microbiology
11th Edition
ISBN: 9781260408997
Author: Joanne Willey
Publisher: Mcgraw-hill Higher Education (us)
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Chapter 28, Problem 2AL
A bacterium isolated from sewage sludge was recently found to be capable of anoxygenic photosynthesis using nitrite as the electron donor, converting it to nitrate. Compare this form of nitrification to that which is well characterized. By removing nitrite from the environment for reductant, what other processes within the nitrogen cycle might this bacterium be influencing?
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Chapter 28 Solutions
Connect With Learnsmart Labs Online Access For Prescott's Microbiology
Ch. 28.1 - Prob. 1MICh. 28.1 - What microbes are capable of methanogenesis and...Ch. 28.1 - Prob. 1.1CCCh. 28.1 - Prob. 1.2CCCh. 28.1 - Prob. 1.3CCCh. 28.1 - Prob. 1.4CCCh. 28.1 - Prob. 1.5CCCh. 28.1 - What are the products of denitrification,...Ch. 28.1 - Prob. 2.1CCCh. 28.1 - Prob. 2.2CC
Ch. 28.1 - Prob. 2.3CCCh. 28.1 - Prob. 2.4CCCh. 28.1 - Prob. 4MICh. 28.1 - Prob. 5MICh. 28.1 - Compare the products of dissimilatory sulfate...Ch. 28.1 - Prob. 3.2CCCh. 28.1 - Prob. 3.3CCCh. 28.1 - Prob. 3.4CCCh. 28.1 - Suggest how a chemolithoautotroph might link the...Ch. 28.2 - What organisms benefit from nitrification?Ch. 28.2 - List three greenhouse gases. Discuss their...Ch. 28.2 - Prob. 2CCCh. 28.2 - How do changes in the nitrogen cycle caused by...Ch. 28.2 - Prob. 4CCCh. 28 - Prob. 1RCCh. 28 - Prob. 2RCCh. 28 - Prob. 3RCCh. 28 - Prob. 5RCCh. 28 - Prob. 6RCCh. 28 - Prob. 7RCCh. 28 - Prob. 8RCCh. 28 - Prob. 1ALCh. 28 - A bacterium isolated from sewage sludge was...Ch. 28 - Prob. 3ALCh. 28 - Prob. 4AL
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- Which of the following is not correct about nitrogen fixation? Carried out only by few prokaryotic organisms termed diazotrophs It requires metabolic energy None of the above Enzyme that catalyzes the reduction of nitrogen is termed as nitrogenase complexarrow_forwardWhat roles do bacteria play in nitrogen fixation, ammonification, nitrification, and denitrification? (Be detailed in this response and be sure to address all four reactions.)arrow_forwardWhat are the unique problems associated with Nitrogen fixing organisms in terms of energy production and the need for low O2 tension to protect nitrogenase? Can you please describe in detail how Azotobacter and Rhizobium species solve these problems. Thank Youarrow_forward
- What is one of the main aspects of design for Enhanced Biological Phosphorus Removal (EBPR)? a) keeping nitrate and oxygen out of the anaerobic zone b) allowing fermentation in thr aerobic zone which is then recycled to the anaerobic zone c) PHA conversion to VFA's like acetic acid d) none of the abovearrow_forwardName two enzymes that are present in obligate aerobes but lacking in obligate anaerobes. What is the function of each enzyme?arrow_forwardWhat is the role of oxygen in aerobic respiration? What type(s) of metabolism can occur in the absence of oxygen? Name two enzymes that are present in obligate aerobes but lacking in obligate anaerobes. What is the function of each enzyme Describe the difference between the appearance of surface and subsurface colonies in a pour plate. If this is the same bacterial species, why do these differences in colonial growth occur?arrow_forward
- Trace the route of the nutrients PO43- carried by river runoff to a seagrass ecosystem. Indicate the specific process involved (e.g., nitrification, denitrification, etc.) and the chemical form at each step of transformation. draw and edit the diagram please and explain the process, i will upvote :) please look at the example belowarrow_forwardIf two cultures of a facultative anaerobe were grown under identical conditions except that one was exposed to oxygen and the other was completely deprived of oxygen, what differences would you expect to see between the two cultures? (What metabolic pathway would be occurring in each? Why?)arrow_forwardWhat is one difference between fermentation and anaerobic respiration? Since neither requires oxygen, why would a microbe select one of these versus the other? Name a specific microbe which uses fermentation and a specific microbe which uses anaerobic respiration.arrow_forward
- How would you isolate a thermophilic chemolithotroph that uses sulfur compounds as a source of energy and electrons? What changes in the incubation system would be needed to isolate bacteria using sulfur compounds in anaerobic respiration? How would you tell which process is taking place through an analysis of the sulfur molecules present in the spent medium?arrow_forwardRefer to the figure. To identify the molecule that accepts CO2, Calvin and Benson manipulated the carbon fixation cycle by either cutting off CO2 or cutting off light from cultures of photosynthetic algae. They then measured the concentrations of various metabolites immediately following the manipulation. How would these experiments help identify the CO2 acceptor? a) The CO2 acceptor concentration would decrease when either the CO2 or light is cut off. b)The CO2 acceptor concentration would decrease when the CO2 is cut off but increase when the light is cut off. c)The CO2 acceptor concentration would stay the same regardless of the CO2 or light. d)The CO2 acceptor concentration would increase when either the CO2 or light is cut off. e)The CO2 acceptor concentration would increase when the CO2 is cut off but decrease when the light is cut off.arrow_forwardNitrogen fixing organisms have unique problems in terms of energy production and the need for low O2 tension to protect nitrogenase. Describe in detail how Azotobacter and Rhizobium species solve these problems. Thank youarrow_forward
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