PRESCOTT'S MICROBIO W/PROCTORIO
11th Edition
ISBN: 9781264731060
Author: WILLEY
Publisher: MCG
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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
PRESCOTT'S MICROBIO W/PROCTORIO
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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- What product is generated by assimilation in the nitrogen cycle.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_forwardGiven that the bottom of the ocean is anaerobic, what process in the nitrogen cycle is likely to be occurring in this location?arrow_forward
- 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_forwardRegarding nitrogen fixation, are the following statements True or False? a) Atmospheric nitrogen is reduced to the biologically useful form NH3 (or NH4 ). b) Nitrogen fixation in nature and in the lab requires a metal cofactor or catalyst. c) The availability of fixed nitrogen limits biological productivity. d) Ammonium from the atmosphere is fixed to more usable forms of nitrogen, such as nitrite (NO2–). e) Nitrogen fixation is energetically neutral, using a negligible amount of ATP. f) The enzyme nitrogenase, which takes part in nitrogen fixation, is inactivated by oxygen.arrow_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_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_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_forwardName two enzymes that are present in obligate aerobes but lacking in obligate anaerobes. What is the function of each enzyme?arrow_forward
- Imagine you are trying to use an organism to remove organic matter in a wastewater treatment plant (i.e., poop). You would like to maximize the amount of waste consumed while also minimizing the amount of cells produced. Assuming these organisms exist and all other things are equal, what combination of chemoorganotrophic organism and environment would make the most sense to use? An organism that only has the Entner-Duoduroff pathway under anaerobic conditions. This was a trick question – the organism would have to be a chemolithotroph since it is consuming a chemical. An organism that only has the Entner-Duoduroff pathway under aerobic conditions. An organism that only has the Embden Meyer Parnas pathway under anaerobic conditions. An organism that only has the Embden Meyer Parnas pathway under anaerobic conditions.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_forwardWhich of the following statements is false regarding the electron donors in prokaryotic metabolism? A) O The use of organic compounds as electron donors is known as chemo-organotrophy. B) OLithotrophy refers to the use of inorganic molecules as electron sources. C) O Photolysis of water provides electrons to phototrophic organisms such as cyanobacteria. D) O Electrons can be obtained from inorganic chemicals such as H2S. E) O Oxygen can serve as an electron donor.arrow_forward
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