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Tortora ch-6 terms

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Question
Answer
Obligate Aerobes   Organisms that require oxygen to live  
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Facultative anaerobes   Organisms that can use O2 when its present, but do not require it. Their energy production is decreased in the presence of O2  
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Obligate anaerobes   Organisms that are killed in the presence of O2  
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Aerotolerant anaerobes   Organisms who cannot use oxygen for growth but they tolerate it  
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Microaerophiles   Organisms who need an oxygen content lower than the atomosphere  
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Quorum sensing   Cell to cell communication in biofilms  
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Chemically defined medium   One whose exact chemical composition is known  
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complex media   made up of nutrients including extracts from yeasts, meat, plants, or digests of proteins  
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Reducing media   contains ingredients like sodium thioglycolate that deplete oxygen concentration in the culture medium  
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Selective media   Designed to supress growth of unwanted bacteria and encourage the growth of desired microbes  
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Differential media   make it easier to distinguish colonies of the desired organism from other colonies growing on the same plate  
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enrichment culture   provides nutrients and environmental conditions that favor the growth of a particular microbe but not others.  
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List the steps of binary fission   1) cell elongates and DNA is replicated 2)cell wall and plasma membrane begin to constrict 3) cross wall forms 4) cells separate  
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generation time   time required for a cell to divide and the population to double  
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