Brock Biology of Microorganisms (15th Edition)
15th Edition
ISBN: 9780134261928
Author: Michael T. Madigan, Kelly S. Bender, Daniel H. Buckley, W. Matthew Sattley, David A. Stahl
Publisher: PEARSON
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Chapter 5.6, Problem 1MQ
What are some of the problems that can arise when unstained preparations are enumerated in microscopic counts?
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Chapter 5 Solutions
Brock Biology of Microorganisms (15th Edition)
Ch. 5.1 - Define the term generation. What is meant by the...Ch. 5.1 - How do binary fission and budding cell division...Ch. 5.1 - How does the biofilm growth mode differ from that...Ch. 5.1 - Prob. 1CRCh. 5.2 - What is a semilogarithmic plot and what...Ch. 5.2 - For an exponentially growing culture that...Ch. 5.2 - For testing a bacteriums response to a toxic...Ch. 5.2 - How is the generation time (g) of an exponentially...Ch. 5.3 - In which phase of the growth curve do cells divide...Ch. 5.3 - Prob. 2MQ
Ch. 5.3 - Prob. 3MQCh. 5.3 - Describe the growth cycle of a population of...Ch. 5.4 - How do microorganisms in a chemostat differ from...Ch. 5.4 - What happens in a chemostat if the dilution rate...Ch. 5.4 - Do pure cultures have to be used in a chemostat?Ch. 5.4 - How does a chemostat regulate growth rate and cell...Ch. 5.5 - Why would a complex culture medium for Leuconostoc...Ch. 5.5 - In which medium shown in Table 5.1, defined or...Ch. 5.5 - What is meant by the word sterile? Why is aseptic...Ch. 5.5 - How many cells could be present in a single...Ch. 5.5 - Prob. 1CRCh. 5.6 - What are some of the problems that can arise when...Ch. 5.6 - Using microscopic techniques, how could you tell...Ch. 5.6 - Are total cell counts useful if one does not know...Ch. 5.7 - Why is a viable count more sensitive than a...Ch. 5.7 - Describe how you would dilute a bacterial culture...Ch. 5.7 - Prob. 3MQCh. 5.7 - How does a viable count differ from a total count?Ch. 5.8 - List two advantages of using turbidity as a...Ch. 5.8 - Describe how you could use a turbidity measurement...Ch. 5.8 - How can turbidity be used as a measure of cell...Ch. 5.9 - How does a hyperthermophile differ from a...Ch. 5.9 - Prob. 2MQCh. 5.9 - E. coli can grow at a higher temperature in a...Ch. 5.9 - Examine the graph in Figure 5.17. Why is the...Ch. 5.10 - Prob. 1MQCh. 5.10 - What molecular adaptations to cold temperatures...Ch. 5.10 - Prob. 1CRCh. 5.11 - Which phylogenetic domain includes species with...Ch. 5.11 - How does the membrane structure of...Ch. 5.11 - What is Taq polymerase and why is it important?Ch. 5.11 - How do cells of hyperthermophiles prevent heat...Ch. 5.12 - How does the concentration of H+ change when a...Ch. 5.12 - What terms are used to describe organisms whose...Ch. 5.12 - Prob. 3MQCh. 5.12 - Concerning the pH of the environment and of the...Ch. 5.13 - What is the aw of pure water? What is the lower...Ch. 5.13 - What are compatible solutes, and when and why are...Ch. 5.13 - How does a halophile maintain positive water...Ch. 5.14 - How does an obligate aerobe differ from a...Ch. 5.14 - How does a reducing agent work? Give an example of...Ch. 5.14 - How does Superoxide dismutase or superoxide...Ch. 5.14 - Contrast an aerotolerant and an obligate anaerobe...Ch. 5.15 - Why is heat an effective sterilizing agent?Ch. 5.15 - What steps are necessary to ensure the sterility...Ch. 5.15 - Distinguish between the sterilization of...Ch. 5.15 - Contrast the terms thermal death time and decimal...Ch. 5.16 - Define D10 and explain why the killing dose for...Ch. 5.16 - Prob. 2MQCh. 5.16 - Prob. 3MQCh. 5.16 - Prob. 1CRCh. 5.17 - Distinguish between the antimicrobial effects of...Ch. 5.17 - Describe how the minimum inhibitory concentration...Ch. 5.17 - Distinguish between a sterilant, a disinfectant,...Ch. 5.17 - Describe the procedure for obtaining the minimum...Ch. 5 - A medium was inoculated with 5 106 cells/ml of...Ch. 5 - Escherichia coli but not Pyrolobus fumarii will...Ch. 5 - In which direction (into or out of the cell) will...
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- Species Interactions Explain how predators, prey and scavengers interact. Explain whether predators and scavengers are necessary or beneficial for an ecosystem.arrow_forwardmagine that you are conducting research on fruit type and seed dispersal. You submitted a paper to a peer-reviewed journal that addresses the factors that impact fruit type and seed dispersal mechanisms in plants of Central America. The editor of the journal communicates that your paper may be published if you make ‘minor revisions’ to the document. Describe two characteristics that you would expect in seeds that are dispersed by the wind. Contrast this with what you would expect for seeds that are gathered, buried or eaten by animals, and explain why they are different. (Editor’s note: Providing this information in your discussion will help readers to consider the significance of the research).arrow_forwardWhat is the difference between Uniporters, Symporters and Antiporters? Which of these are examples of active transport?arrow_forward
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