Nester's Microbiology: A Human Perspective
9th Edition
ISBN: 9781259709999
Author: Denise G. Anderson Lecturer, Sarah Salm, Deborah Allen
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 4, Problem 7SA
Explain why O2-containing atmospheres kill some microbes.
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What are the toxic effects of O2? How do aerobes and other oxygen-tolerant microbes protect themselves from these effects?
Why does decomposition by microbes deplete O2 ?
Describe the five types of O2 relationships seen in microorganisms.
Chapter 4 Solutions
Nester's Microbiology: A Human Perspective
Ch. 4 - Describe a detrimental and a beneficial effect of...Ch. 4 - Define a pure culture.Ch. 4 - Prob. 3SACh. 4 - Explain how the environment of a colony differs...Ch. 4 - Prob. 5SACh. 4 - Why would botulism be a concern with canned foods?Ch. 4 - Explain why O2-containing atmospheres kill some...Ch. 4 - Explain why photoautotrophs are primary producers.Ch. 4 - Distinguish between a selective medium and a...Ch. 4 - Prob. 10SA
Ch. 4 - Prob. 1MCCh. 4 - Compared with their growth in the laboratory,...Ch. 4 -
3. Cells are most sensitive to penicillin during...Ch. 4 - Which best describes the intestinal tract? a) An...Ch. 4 - E. coli, a facultative anaerobe, is grown for 24...Ch. 4 - The generation time of a bacterium was measured at...Ch. 4 - Which of the following is false? a)E. coli grows...Ch. 4 -
8. If the pH indicator were left out of MacConkey...Ch. 4 -
9. A soil sample is placed in liquid and the...Ch. 4 -
10. If the concentration of E. coli in a broth is...Ch. 4 -
1. You are a microbiologist working for a...Ch. 4 - High-performance boat manufacturers know that...Ch. 4 - This figure shows a growth curve plotted on a...Ch. 4 - Prob. 2CT
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- Why do obligate aerobes (and facultative anaerobes) need oxygen? Be specific.arrow_forwardOut of the 5 possible oxygen requirements (Obligate aerobes, microaerophiles, etc), what specifically is E. coli, Pseudomonas aeruginosa, and Clostridium sporogenes?arrow_forwardYou have discovered a new microorganism that oxidizes ammonia. How will you determine if this microbe is a thaumarchaeote or a bacterium?arrow_forward
- Toxic byproducts are made by some organisms that use oxygen for metabolism. true/ falsearrow_forwardIn the sediments at the bottoms of ponds and lakes, there is often absolutely no O2 at depths of 0.5 cm or more, even if the water above is rich in O2. How is this possible? (Do not put answer from chegg thanks).arrow_forwardHow does incineration destroy microbes?arrow_forward
- Why are certain bacteria hazardous to oxygen?arrow_forwardExplain the symbiotic interaction between bacteria and other living organisms that can sustain their life in the hydrothermal vent.arrow_forwardAre all organisms with oxidative respitory pathways necessarily strict aerobes? Explain.arrow_forward
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