Microbiology: Principles and Explorations
10th Edition
ISBN: 9781119390114
Author: Black
Publisher: WILEY
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Chapter 7, Problem 2.2SC
What enzymes do most obligate anaerobes lack? How does this cause them to die in the presence of oxygen?
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Chapter 7 Solutions
Microbiology: Principles and Explorations
Ch. 7 - What are the differences between the lag phase and...Ch. 7 - How does logarithmic rate of increase differ from...Ch. 7 - Prob. 1.3SCCh. 7 - Why does a direct microscopic count of bacteria...Ch. 7 - What does the ending -phile mean? Distinguish...Ch. 7 - What enzymes do most obligate anaerobes lack? How...Ch. 7 - Prob. 2.3SCCh. 7 - Prob. 3.1SCCh. 7 - Distinguish between the various kinds of media:...Ch. 7 - What is the purpose of a stock culture? Why is it...
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- A chemolithoautotroph is respiring using only iron (Fe3+) and nitrite (NO2-). This bacterium does not consume organic molecules. From where does this organism obtain its carbon?arrow_forwardWhat is obligate aerobes and obligate anaerobe? Give examples.arrow_forwardMicroaerophiles A) O do not require oxygen for growth B) O are the same as facultative anaerobes C) O have the same oxygen reguirements as aerotolerant anaerobes D) O completely lack enzymes protecting them from the damaging effects of oxygen. E O None of the above are correctarrow_forward
- Why is Hydrogen peroxide solution so effective against anaerobes?arrow_forwardRequires oxygen at a lower concentration than typically found in air. Question 3 options: a) Obligate aerobe b) Facultative anaerobe c) microaerophile d) None of the abovearrow_forwardWhy are microorganisms called extremophiles?arrow_forward
- Flasks 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_forwardA chemolithoautotroph is respiring using only iron (Fe3+) and nitrite (NO2-). This bacterium does not consume organic molecules. What is the electron donor for this system?arrow_forwardWhy does an facaltive anaerobic bacterium usually grow better with oxygen than without?arrow_forward
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