Brock Biology of Microorganisms (14th Edition)
14th Edition
ISBN: 9780321897398
Author: Michael T. Madigan, John M. Martinko, Kelly S. Bender, Daniel H. Buckley, David A. Stahl, Thomas Brock
Publisher: PEARSON
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Textbook Question
Chapter 5.11, Problem 1MQ
How does a hyperthermophile differ from a psychrophile?
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How do hyperthermophiles keep proteins and DNA from beingdestroyed by high heat?
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) O extreme halophiles
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D) O hyperpsychrophiles
E) O hyperthermophiles.
Chapter 5 Solutions
Brock Biology of Microorganisms (14th Edition)
Ch. 5.1 - Summarize the steps that lead up to binary fission...Ch. 5.1 - Define the term generation. What is meant by the...Ch. 5.2 - Prob. 1MQCh. 5.2 - Prob. 2MQCh. 5.2 - Prob. 3MQCh. 5.3 - Prob. 1MQCh. 5.3 - Prob. 2MQCh. 5.3 - Prob. 3MQCh. 5.4 - What are autolysins and why are they necessary?
Ch. 5.4 - What is the function of bactoprenol?
Ch. 5.4 - What is transpeptidation and why is it important?
Ch. 5.5 - What is a semilogarithmic plot and what...Ch. 5.5 - Prob. 2MQCh. 5.5 - Prob. 3MQCh. 5.6 - In which phase of the growth curve do cells divide...Ch. 5.6 - Prob. 2MQCh. 5.6 - Prob. 3MQCh. 5.7 - How do microorganisms in a chemostat differ from...Ch. 5.7 - What happens in a chemostat if the dilution rate...Ch. 5.7 - Do pure cultures have to be used in a chemostat?Ch. 5.8 - What are some of the problems that can arise when...Ch. 5.8 - Using microscopic techniques, how could you tell...Ch. 5.9 - Why is a viable count more sensitive than a...Ch. 5.9 - Describe how you would dilute a bacterial culture...Ch. 5.9 - Prob. 3MQCh. 5.10 - List two advantages of using turbidity as a...Ch. 5.10 - Describe how you could use a turbidity measurement...Ch. 5.11 - How does a hyperthermophile differ from a...Ch. 5.11 - Prob. 2MQCh. 5.11 - E. coli can grow at a higher temperature in a...Ch. 5.12 - Prob. 1MQCh. 5.12 - What molecular adaptations to cold temperatures...Ch. 5.13 - Which phylogenetic domain includes species with...Ch. 5.13 - How does the membrane structure of...Ch. 5.13 - What is Taq polymerase and why is it important?Ch. 5.14 - How does the concentration of H+ change when a...Ch. 5.14 - What terms are used to describe organisms whose...Ch. 5.15 - What is the aw of pure water? What is the lower...Ch. 5.15 - What are compatible solutes, and when and why are...Ch. 5.16 - How does an obligate aerobe differ from a...Ch. 5.16 - How does a reducing agent work? Give an example of...Ch. 5.16 - How does Superoxide dismutase or superoxide...Ch. 5.17 - Why is heat an effective sterilizing agent?Ch. 5.17 - What steps are necessary to ensure the sterility...Ch. 5.17 - Distinguish between the sterilization of...Ch. 5.18 - Define D10 and explain why the killing dose for...Ch. 5.18 - Prob. 2MQCh. 5.18 - Prob. 3MQCh. 5.19 - Distinguish between the antimicrobial effects of...Ch. 5.19 - Describe how the minimum inhibitory concentration...Ch. 5.19 - Distinguish between a sterilant, a disinfectant,...Ch. 5 - Prob. 1RQCh. 5 - Describe the role of proteins present at the...Ch. 5 - Prob. 3RQCh. 5 - Describe how new peptidoglycan subunits are...Ch. 5 - Prob. 5RQCh. 5 - Describe the growth cycle of a population of...Ch. 5 - How does a chemostat regulate growth rate and cell...Ch. 5 - How does a viable count differ from a total count?Ch. 5 - How can turbidity be used as a measure of cell...Ch. 5 - Prob. 10RQCh. 5 - Prob. 11RQCh. 5 - Concerning the pH of the environment and of the...Ch. 5 - How does a halophile maintain positive water...Ch. 5 - Prob. 14RQCh. 5 - Prob. 15RQCh. 5 - Contrast the terms thermal death time and decimal...Ch. 5 - Prob. 17RQCh. 5 - Prob. 18RQCh. 5 - Prob. 19RQCh. 5 - Describe the procedure for obtaining the minimum...Ch. 5 - Prob. 21RQCh. 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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- How does a halophile maintain positive waterbalance while growing in a solution high in NaCl?arrow_forwardHow does an aerotolerant anaerobe differ from a microaerophile?arrow_forwardA hyperthermophile most likely has: a) cryoprotectants b) low void volume proteins c) unsaturated fatty acids d) isoprenoid lipidsarrow_forward
- A chemolithotroph would use which of the following as a source of energy? magnetic field glucose light H2arrow_forwardWhat is meant by the term “chemolithotrophy”? In what wayare chemolithotrophs like plants?arrow_forwardAn obligate halophile is an organism that requires high osmotic pressure.True or false?arrow_forward
- How to isolate a thermophilic chemolithotroph that uses sulphur compounds as a source of energy and electrons, how would you achieve this?arrow_forwardWhy are microorganisms called extremophiles?arrow_forwardGiven what is known about humans, why is it unlikely that a thermophile or a psychrophile would be a human pathogen?arrow_forward
- What are Thermoacidophiles ?arrow_forwardHow would you isolate thermophilic chemolithotroph thatuses sulfur compounds as a source of energy and electron?What changes in the incubation system will be required toisolate a bacteria using sulphur in an anaerobic system?arrow_forward1(a)What is a psychrotroph? (b)From what natural sources would you isolate a thermophile? A psychrophile? (C)How does temperature affect the growth of a microorganism? (D)State the temperature class for Escherichia coli, Bacillus sp, Aeromonas sp, Micrococcus luteus, and suggest their optimum growth temperature. 2 (a)Why is dilution important when determining microbe number? (B)How does a decrease in dye colour intensity affect the microbe ? (C)State the possible sources of error if plate counts and colour intensity of dilutions are incorrect or Precautions taken to prevent this from happening. ( this is not a graded assignment)arrow_forward
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