Microbiology: An Introduction
11th Edition
ISBN: 9780321733603
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: Benjamin Cummings
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Chapter 27, Problem 6R
Summary Introduction
To review:
The symbiotic relationship of cyanobacteria, mycorrhizae, Rhizobium and Frankia with their respective hosts.
Introduction:
In a symbiotic relationship, both organisms associating with each other are mutually benefitted. Nitrogen-fixing bacteria provide nitrogen, which is essential for organisms in amino acid synthesis, and in return the host provides a habitat; an anaerobic condition and nutrients necessary for bacterial growth. The process which is involved in the conversion of atmospheric nitrogen into ammonia is known as nitrogen fixation. The reaction is catalyzed by an oxygen-sensitive nitrogenase enzyme.
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Chapter 27 Solutions
Microbiology: An Introduction
Ch. 27 - The koala is a leaf-eating animal. What can you...Ch. 27 - Give one possible explanation of why Penicillium...Ch. 27 - In the sulfur cycle, microbes degrade organic...Ch. 27 - Why is the phosphorus cycle important?Ch. 27 - DRAW IT 5. Identify where the following processes...Ch. 27 - Prob. 6RCh. 27 - Outline the treatment process for drinking water.Ch. 27 - Prob. 8RCh. 27 - Bioremediation refers to the use of living...Ch. 27 - NAME IT 10. These nitrogen-fixing prokaryotes...
Ch. 27 - Prob. 1ACh. 27 - Explain the effect of dumping untreated sewage...Ch. 27 - Activated sludge system a. the process takes place...Ch. 27 - Prob. 2MCQCh. 27 - Nitrogen fixation a. the process takes place under...Ch. 27 - Prob. 4MCQCh. 27 - The water used to prepare intravenous solutions in...Ch. 27 - CO2+H2SLightLightC6H12O6+S0 a. aerobic respiration...Ch. 27 - Prob. 7MCQCh. 27 - CO2+8H++8eCH4+2H2O a. aerobic respiration b....Ch. 27 - Prob. 9MCQCh. 27 - Coliforms are used as indicator organisms of...Ch. 27 - Flooding after two weeks of heavy rainfall in...Ch. 27 - The bioremediation process shown in the photograph...
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- Give a complete definition of mycorrhizae, citing the two main classes and the differences between them.arrow_forwardGive the significance of mycorrhizal association to the host plant and to the fungi.arrow_forwardWhich is false among A-E regarding symbiotic nitrogen fixation? A) O Initiation of the symbiosis involves communication between the plant and bacteria B)O Within the plant, the bacteria differentiate into N2 fixing bacteroids C) O The N2-fixation process is sensitive to oxygen. D) O The bacteria infect the root of the plant via an infection thread. E) O None are false; A-E are all true,arrow_forward
- Why would it be disadvantageous for a plant to form a symbiotic relationship with a mycorrhizal fungus when phosphate is abundant in the soil surrounding its roots?arrow_forwardWhich of the following would be an example of a microbial chemoautotroph? A yeast using oxidation/reduction of organic compounds as the energy source and organic compounds as the carbon source. An archaean using oxidation/reduction of inorganic compounds as the energy source and a organic compounds as the carbon source. A cyanobacterium using light as the energy source and CO2 as the carbon source. A bacterium using oxidation/reduction of inorganic compounds as the energy source and CO2 as the carbon source.arrow_forwardDescribe the two symbiotic relationships between a fungus and another organism along with the explanation that how each partner is affected by the association.arrow_forward
- Mycorrhiza is an example of what?arrow_forwardExplain symbiotic activities of fungi.arrow_forwardAll of the following are ways microorganisms adapt to limited nutrients except: synthesize increased amount of enzymes for uptake and metabolism of limited nutrients form metabolically active highly resistant endospores synthesize enzymes needed to use a different nutrient acetic acid adjust the rate at which they metabolize nutrientsarrow_forward
- write an article on Cryptosporidium a pathogenic eukaryote parasite. What is the natural habitat for this organism? (water, soil, humans, plants, etc.) What clinical significance does this organism have for humans? (What disease/infections does it cause in humans?) What is the mode of transmission to humans? (How do you get an infection with this organism?) What is the worldwide geographic distribution for this organism? (Where is it found, where have there been reported cases or outbreaks lately?)arrow_forwardFor fungal organism to be considered a "true" or "primary" pathogen it would need to be able to: Be completely nontreatable with antimicrobial agents Cause illness Invade an grow in a healthy, non-compromised host Be a member of the Candida genusarrow_forwardIn endomycorrhizal associations, the fungus enters the cell wall of the plant cells to share nutrients. Ture Falsearrow_forward
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