Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
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Chapter 31.4, Problem 1CC
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d) Microbial death rate increases as pH approaches 7 (neutral)
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Chapter 31 Solutions
Prescott's Microbiology
Ch. 31.1 - How are filamentous microbes especially well...Ch. 31.1 - Prob. 1CCCh. 31.1 - Prob. 2CCCh. 31.1 - What microbes commonly degrade cellulose and...Ch. 31.1 - Which of the following soils would a farmer be...Ch. 31.1 - Why is most nitrogen fertilizer added as ammonium...Ch. 31.2 - What are the differences in preferred soil...Ch. 31.2 - What types of archaea have been detected in soils?Ch. 31.2 - Prob. 3CCCh. 31.3 - Define rhizosphere, rhizoplane, and associative...
Ch. 31.3 - What unique stresses does a microorganism on a...Ch. 31.3 - List two ways in which compounds produced by...Ch. 31.3 - What important genera are involved in associative...Ch. 31.3 - Prob. 1MICh. 31.3 - Prob. 2.1CCCh. 31.3 - Prob. 2.2CCCh. 31.3 - What is the function of the rhizomorph and the...Ch. 31.3 - Describe the uptake and transfer of ammonium by...Ch. 31.3 - Propose two potential functions for mycorrhization...Ch. 31.3 - How do you think Frankia spp. protect nitrogenase...Ch. 31.3 - List several bacteria that are considered...Ch. 31.3 - Prob. 3.2CCCh. 31.3 - What does the term terminally differentiated mean?Ch. 31.3 - How does nitrogen transfer between a rhizobium and...Ch. 31.3 - What is unusual about leghemoglobin production and...Ch. 31.3 - What are the two general mechanisms by which...Ch. 31.3 - How does the production of opines by the plant...Ch. 31.3 - What is the difference between the Ti plasmid and...Ch. 31.3 - What functions do the members of the two-component...Ch. 31.3 - What are the two general ways by which plant...Ch. 31.3 - How are plant pathologists attempting to control...Ch. 31.4 - Compare and contrast the metabolism (specifically,...Ch. 31.4 - What happens in terms of microbiological processes...Ch. 31.4 - What microbial genera have been observed in oil...Ch. 31 - Prob. 1RCCh. 31 - Prob. 2RCCh. 31 - Prob. 3RCCh. 31 - Prob. 4RCCh. 31 - Prob. 5RCCh. 31 - Prob. 6RCCh. 31 - Prob. 7RC
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- Categorise the microbial growth into four phases. In your own words, briefly describe each of themarrow_forwardIdentify external sources of energy that are used by microbes, as well as energy carriers and other immediately available sources of energy that that microbial cells use for growth processes.arrow_forwardAmong these five areas in the laboratory: air, faucet, table, floor, table, the doorknob, which is expected to have the most number of microorganisms? and which among the areas may contain potentially pathogenic microbes? Provide an explanation.arrow_forward
- A microbe is only capable of growth at pH range of 8.5-10 in the presence of atmospheric levels of oxygen. Which statements are correct? Mark all that apply. A.)The microbe is likely to be a human pathogen B.)The microbe is a mesophile C.)The microbe is an obligate aerobe D.) The microbe is an alkiliphilearrow_forwardDescribe several physical and chemical requirements for microbial growth, and explain what factors determine optimal conditions.arrow_forwardProvide an example of an organism within each of the four main nutritional categories of microbes and describe how each obtains its essential nutrients. Provide evidence in support of or refuting the following statement: Microbial life can exist in the complete absence of both sunlight or organic nutrients. Polymerase chain reaction (PCR) is a technology that requires high temperatures to reproduce DNA fragments. Explain why the discovery of thermophilic archaea and their associated DNA polymerases was critical to the success of this technique. Summarize how the electron transport chain functions to produce ATP in a bacterial cell versus eukaryotic cell. Explain whether or not the term chemiosmosis accurately illustrates this process.arrow_forward
- Describe the importance of the nitrogen and carbon cycles and the role of microbes in their maintenance. Discuss biofilms and their relevance to infectious diseases. Discuss population growth and the phases of a typical bacterial growth curve. Describe generation time for a bacterial population Explain how bacterial growth correlates to disease. Describe how environmental changes can alter the shape of a growth curve. Categorize microbes based on their preferred environmental niches (pH, temperature, oxygen and salt). Identify the biological properties that allow different classes of microbes to grow in extreme environments.arrow_forwardDescribe how microbial populations interact within a living biofilm. Describe the advantages to living in a biofilm and the genetic changes that occur in cells that adopt this lifestyle.arrow_forwardMicroorganisms are needed in wastewater treatment facility to do the actual breakdown and removal of nutrients and organic matter in the waste matter. One day, the employee who is in-charge of the facility notice that as the time goes by after the wastewater was loaded into the medium the metabolic activity of the microbe cease to increase and remain stable instead. Within the context of our discussion, what could be the possible explanation for the employee’s observation?arrow_forward
- In microbiology, the term growth in a culture usually refers to an increase in O 1) the number and size of microbial cells. O 2) the amount of ATP consumed. O 3) a microbe's size. O 4) the number of microbial cells. 5) the amount of ATP produced.arrow_forwardthe interactions of microorganisms with each other and/or with their physical environment contribute to functioning of ecosystems. with named examples where necessary, outline two types of interactions displayed between microbial populations.arrow_forwardWhat are all the descriptive terms used for microbes that live in different environments or the terms used for the environments that they live in? What does each term mean? In what types of environments are each microbial group found?arrow_forward
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