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Microbiology 206

Quiz: Bacterial Genetics

QuestionAnswer
Do Microorganisms need some amount of H2O? ~ Yes
Osmotolorant is bactera that can tolerate high ? concentrations. ~ Salt
10% of Osmotolerants are: ~ Stappylococcus (grapecluster rounds)
A bacteria that needs high levels of salt to grow is called: ~ Halophiles
High levels of ? and ? are used as food preservatives. ~ sugars and salts
In osmotic pressue, microbes obtain almost all their nutrients in solution from: ~ surrounding water
Which tonicity means equal, more and less in solutes ~ isotonic (equal), hypertonic (more), hypotonic (less)
What is the meaning of obligate aerobes? ~ need oxygen
What is the meaning of obligate anaerobs? ~ cannot function in the presence of oxygen
What is the meaning of facultative anaerobes? ~ gow better if oxygen is present, but can grow without.
What is the meaning of microaerophiles? ~ need small amounts of oxygen
What is the meaning of aerotolerant anaerobes? ~ indifferent to oxygen
Superoxide (O2-) is produce by what percentage of organisms? ~ 100%
Superoxide is toxic to ? and must be ? ~ cells / neutralized
What is also toxic like superoxide? ~ Hydrogen peroxide
What does superoxide steal from cells? ~ electrons
Obligat Anaerobes lack what 2 things? ~ SOD (superoxide dismutase), and catalase
Created by: Patrick24g
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