Illustrations for Exam 3 (1)

Illustrations for Exam 3 (1) - Ch 4 5 septum forms...

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Ch. 4, 5
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septum forms crosswalls form
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septum crosswall
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Petroff-hausser cell counter above the grid is a space of defined volume where the bacterial suspension is added grided microscope slide. cells in squares are counted
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Spread plate Pour plate
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TURBIDIMETRIC ASSAY Uses spectrophotometer. .
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Growth curve Growth curve  = plot of log  number of cells per ml vs  time Phases of Growth 1. Lag phase 2. Exponential (logarithmic)  growth phase 3. Stationary phase 4. Death phase
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Element Function in the cell Carbon Primary constituent of cellular material Oxygen Primary constituent of water. 0 2 is the final electron acceptor in aerobic respiration Nitrogen Constituent of amino acids and nucleic acids Hydrogen Constituent of water Phosphorus Constituent of nucleic acids, phospholipids, coenzymes and metabolic intermediates Sulfur Constituent of amino acids Potassium Cofactor of some enzymes Magnesium Cofactor of enzymes Calcium Endospore heat resistance; cofactor of some enzymes Iron Constituent of cytochromes; cofactor of some enzymes
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