Microbiology - Notes for Exam 2

Last update by Fai492 on 03/02/2012
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What are cardinal temperatures?

The minimum, optimum, and maximum temperatures at which an organism grows

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    What is a psychrophile?
    A microorganism that has a low optimal temperature
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    A microorganism that has a mid-range optimal temperature
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    A microorganism that has a high optimal temperature
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    They have more alpha helices than beta sheets; more polar and less hydrophobic amino acids; fewer weak bonds; decreased interactions between protein domains; have cytoplasmic membranes with higher content of unsaturated fatty acid and shorter-chain fatty acids to help remain semi-fluid at low temps; cells do not die once frozen because certain enzymes can continue to function
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    Do phototrophic or non-phototrophic organisms grow at higher at higher temperatures?
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    How do enzymes and proteins that function optimally at high temperature differ from those that don't?
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