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23 Cards in this Set
- Front
- Back
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Define Microbial Growth
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To increase in number
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Define generation time
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Period of time from birth to production of offspring
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What is the generation time for bacteria? Explain what this means
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30 minutes. Every thirty minutes bacteria double in number
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Name the five categories of factors that effect bacterial growth
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1-Temperature
2-pH 3-Media 4-Chemicals 5-Oxygen needs |
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What is the term used to define microbes that prefer -5C to 20C?
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Psychrophiles
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What temperature do mesophiles prefer?
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20C to 50C
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What temperature do thermophiles prefer?
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50C to 80C
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What temperature do Extreme Thermophiles grow best in?
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80C to 120C
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What is E. coli's optimal temperature?
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20 to 50C
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What is N. gonorrheae's optimal temperature?
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37C
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What happens to the rate of metabolism as temperature increases?
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metabolism increases until the protein is denatured
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What is the final electron acceptor in electron transport system?
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oxygen
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Define obligated aerobe
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a Microbe that requires oxygen
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Define obligated anaerobe
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A microbe that can't tolerate oxygen
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What does it mean to be a facultative anaerobe?
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If oxygen is not available they use something else as an electron acceptor, but their metabolism is higher when oxygen is available
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What does it mean for a microbe to be aerotolerant?
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It tolerates oxygen, but it will grow in the presence or absence of oxygen. IF oxygen is available, they won't use it.
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What are microphilic organisms' oxygen needs?
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They need oxygen in small amounts
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What is an organism called if it grows best in an environment rich in Carbon Dioxide?
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Microaerophilic
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In RNA what does adenine pair with?
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Uracil
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Define oxidation
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Removal of electrons from a molecule
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Where is the greatest amount of ATP produced?
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The electron transport system
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Define bacteriophage
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A virus that infects a bacterial cell
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What is generation time of a prokaryote defined as?
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The length of time it takes a prokaryote to produce 2 daughter cells.
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