Laboratory Experiments in Microbiology (11th Edition)
11th Edition
ISBN: 9780321994936
Author: Ted R. Johnson, Christine L. Case
Publisher: PEARSON
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Textbook Question
Chapter 19, Problem 1CT
Bergey’s Manual describes Streptococcus and Escherichia as facultative anaerobes. How do the oxygen requirements of these organisms differ? Which one could correctly be called an aerotolerant anaerobe?
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Chapter 19 Solutions
Laboratory Experiments in Microbiology (11th Edition)
Ch. 19 - Can aerobic bacteria grow in the absence of O2 ?...Ch. 19 - Prob. 2QCh. 19 - Why will obligate anaerobes grow in thioglycolate?Ch. 19 - To what do you attribute the odors of anaerobic...Ch. 19 - Bergeys Manual describes Streptococcus and...Ch. 19 - Prob. 2CTCh. 19 - The catalase test is often used clinically to...Ch. 19 - Prob. 1CA
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- Salmonella typhi is a facultative anaerobe. Explain why.arrow_forwardWhat metabolic process creates the rotten-egg smell characteristic of many anaerobic environments?arrow_forwardWhat is one difference between fermentation and anaerobic respiration? Since neither requires oxygen, why would a microbe select one of these versus the other? Name a specific microbe which uses fermentation and a specific microbe which uses anaerobic respiration.arrow_forward
- Why is Hydrogen peroxide solution so effective against anaerobes?arrow_forwardFlasks A and B contain broth, and are inoculated with an identical number of bacteria that are facultative anaerobes. Flask A contains a triglyceride lipid as the sole nutrient source, and Flask B contains a monosaccharide called fructose as the sole nutrient source. Both flasks are incubated at 30°C with aeration (oxygen is added to the broth). Assume the bacteria are capable of catabolism of both fructose and triglycerides. Mark all the correct statements pertaining to these cultures. A. Under anaerobic conditions, cells in flask A will produce more ATP B. Cells from flask B will produce more carbon dioxide C. Cells from flask B will produce more ATP D. Flask A will have the greater cell mass E. Cells from flask A will produce more ATP F. Cells from flask A will produce more carbon dioxide G. Flask B will have the greater cell mass H. Under anaerobic conditions, cells in flask B will produce more ATParrow_forwardI need to find two gram positive and two gram negative pathogenic bacteria that may be classified as being facultative anaerobes. What tissues or organs do these bacteria target in the human body? Why is it to their advantage to be able to use either aerobic respiration or anaerobic respiration/fermentation?arrow_forward
- what practical importance are air-borne microorganisms to the laboratory workers? What precautions should be taken to control laboratory contaminants?arrow_forwardDetermine the following about Corynebacteria diphtheria..... Determine the microbes possible mechanism(s) of cellular respiration. Do they perform aerobic respiration or anaerobic respiration? Are they capable of performing fermentation?arrow_forwardBacteria in the genus Clostridium are known for living within the deepest areas within puncture wounds, causing diseases like tetanus and gas gangrene. Based on the description provided, what category of oxygen requirement would be appropriate for the genus Clostridium?arrow_forward
- Using a textbook or a reputable internet source, find two Gram-positive pathogenic bacteria and two Gram-negative pathogenic bacteria that may be classified as being facultative anaerobes. What tissues or organs do these bacteria target in the human patient? Why is it to their advantage to be able to use either aerobic respiration or anaerobic respiration/fermentation?arrow_forwardEscherichia coli O157:H7 is a foodborne pathogen and can cause serious illness in humans by producing toxins that can severely damage the lining of intestines and kidneys. What are the oxygen requirements of coli? What result would you observe in the MTM agar deep test? Explain. Research on the growth requirements of this bacterium is required. What is the role of oxygen and cytochrome c oxidase in aerobic respiration? Why does the nitrate reduction tube turn red after the addition of zinc? Clostridium tetani is a common soil bacterium and causes tetanus. Would you expect tetani to possess the enzyme catalase? Explain. Research on the growth requirements of this bacterium is required.arrow_forwardOxygen is always beneficial to micro-organisms. Discuss this statement in the context of factors that influence microbial growth.arrow_forward
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