EBK BROCK BIOLOGY OF MICROORGANISMS
15th Edition
ISBN: 8220103633352
Author: Stahl
Publisher: PEARSON
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Textbook Question
Chapter 15.11, Problem 2MQ
What are some ecological strategies that sulfur oxidizers use to compete with the spontaneous (chemical) oxidation of H2S?
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Refer 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.
Chapter 15 Solutions
EBK BROCK BIOLOGY OF MICROORGANISMS
Ch. 15.1 - Why is it necessary to consider microbial...Ch. 15.1 - What are three reasons that functional traits...Ch. 15.1 - What is convergent evolution and how is it...Ch. 15.2 - What form of photosynthesis was most likely the...Ch. 15.2 - Which bacterial phyla contain phototrophs?Ch. 15.3 - What are the differentiating properties of the...Ch. 15.3 - Prob. 2MQCh. 15.3 - How are prochlorophytes, such as Prochlorococcus,...Ch. 15.4 - What is the source of the purple color from which...Ch. 15.4 - Prob. 2MQ
Ch. 15.4 - Compare and contrast the metabolism, morphology,...Ch. 15.5 - What are some similarities between purple...Ch. 15.5 - Prob. 2MQCh. 15.5 - Compare and contrast the metabolism of purple...Ch. 15.6 - Prob. 1MQCh. 15.6 - Prob. 2MQCh. 15.6 - Prob. 1CRCh. 15.7 - Prob. 1MQCh. 15.7 - Prob. 2MQCh. 15.7 - Prob. 1CRCh. 15.8 - What types of anoxygenic phototrophs contain...Ch. 15.8 - Prob. 2MQCh. 15.8 - In what ways is Chloracidobacterium thermophilum...Ch. 15.9 - What are the typical electron donors used by...Ch. 15.9 - What bacterial phyla are known to contain...Ch. 15.9 - Prob. 1CRCh. 15.10 - What are the typical electron donors used by...Ch. 15.10 - Prob. 2MQCh. 15.10 - In what ways are sulfur-reducing bacteria...Ch. 15.11 - Describe the energy and carbon metabolism of...Ch. 15.11 - What are some ecological strategies that sulfur...Ch. 15.11 - Prob. 1CRCh. 15.12 - What mechanisms do free-living diazotraphs use to...Ch. 15.12 - Prob. 2MQCh. 15.12 - What are some ways that diazotrophs protect...Ch. 15.13 - Under what conditions would you expect...Ch. 15.13 - Prob. 2MQCh. 15.13 - Prob. 1CRCh. 15.14 - In what phylogenetic groups are Geobacter and...Ch. 15.14 - Prob. 2MQCh. 15.14 - Prob. 1CRCh. 15.15 - What habitat characteristics govern the diversity...Ch. 15.15 - How do aerobic neutrophilic iron-oxidizers keep...Ch. 15.15 - Prob. 1CRCh. 15.16 - What is the difference between a methanotroph and...Ch. 15.16 - What is unique about the methanotroph...Ch. 15.16 - What are the differences between type I and type...Ch. 15.17 - Prob. 1MQCh. 15.17 - What are the different ways in which species of...Ch. 15.17 - Compare and contrast the life cycle of Myxococcus...Ch. 15.18 - Prob. 1MQCh. 15.18 - Prob. 2MQCh. 15.18 - Prob. 1CRCh. 15.19 - What are the major differences between spirochetes...Ch. 15.19 - Name two diseases of humans caused by spirochetes.Ch. 15.19 - Contrast the motility of spirochetes with that of...Ch. 15.20 - Prob. 1MQCh. 15.20 - Prob. 2MQCh. 15.20 - Contrast the life cycle of Hyphomicrobium with...Ch. 15.21 - Describe how a sheathed bacterium such as...Ch. 15.21 - List two metals that are oxidized by sheathed...Ch. 15.21 - In what environment might you expect to find...Ch. 15.22 - What benefit do magnetic bacteria accrue from...Ch. 15.22 - Would you expect to find greigite or magnetite in...Ch. 15.22 - In what way does a magnetosome contribute to the...Ch. 15 - Describe a key physiological feature of the...Ch. 15 - Describe the metabolism for each of the following...Ch. 15 - Using an example from each of the morphologically...
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- The purple sulfur bacteria using PSII produce reducing power (i.e. NADH) during the light reactions of photosynthesis by what process? a) The reverse TCA cycle b) The Calvin cycle c) Cyclic photophosphorylation d) Reverse electron flowarrow_forwardGreen sulfur bacteria are able to generate which of the following inorganic product molecules during anoxygenic photosynthesis? elemental sulfur glucose C6H12O6 oxygen hydrogen sulfide Green sulfur bacteria are able to generate which of the following inorganic product molecules during anoxygenic photosynthesis? elemental sulfur glucose C6H12O6 oxygen hydrogen sulfidearrow_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
- At which point in the sulfur cycle does sulfur enter the food chain?arrow_forwardWhy is nitrogen fixation so energetically costly?arrow_forwardWhat is the detailed physiology of Sulfur Oxidizing Organisms (e.g. bacteria) in terms of metabolism, physical properties, diversity, and distribution?arrow_forward
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- Which of the following formulas are correct regarding productivity? (recall; GPP gross primary production, NPP = net primary production, & R = respiration) Mark only one oval. OA) GPP+R=NPP OB) GPP-R=NPP C) NPP-GPP=R D) NPP-R=GPP Plants assimilate energy through the process of which? Mark only one oval. A) decomposition. B) respiration. C) photosynthesis. V D) regeneration. Net primary productivity in an ecosystem increases as mean annual temperature... Mark only one oval. OA) and mean annual rainfall decrease. B) decreases and mean annual rainfall increases. C) increases and mean annual rainfall decreases. D) and mean annual rainfall increases. Garrow_forwardList environments in which methanogenesis and methane oxidation occurarrow_forwardIron bacteria, sulfur-oxidizing bacteria, and nitrifying bacteria, which all oxidize inorganic compounds through a series of chemical reactions, are best described as O 1) photoheterotrophs 2) chemoheterotrophs O 3) chemolithotrophs. O 4) photoautotrophs 5) chemoautotrophs.arrow_forward
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