ESPM 131 class note 2008211

ESPM 131 class note 2008211 - Microbial metabolism Basic...

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Microbial metabolism Basic concepts - Metabolism: Sum of all chemical reactions that accur within living cells. Ultimate goal: obtain energy and carbon. - Anabolism: biomass synthesis Sum of all biosynthesis reactions in the cells. Essential for growth, reproductions, repair - Catabolism: energy generation. Biochemical reactions that break down large molecules, releasing usable energy for the cells. Essential for probiding energy for life processes; transpoty and synthesizing What do organisms need to grow? 1. Energy source 2. Carbon source 3. mineral nutrients and growth factos 4. Energetically favorable redox environment. 1. Energy source - organic chemical - inorganic chemical - light Organisms using light as the energy source is called phototrophy Organisms using chemicals as the energy source is called chemotrophy. Chemolithotrophs ( using inorganic compound) Phototrophs – collect sunlight 2. Carbon source - All cells require C as a major nutrient - Heterotrophs: require organic compound - Autotrophs: CO2 is the source for cell C= primary producers. Microbial nutrition
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ESPM 131 class note 2008211 - Microbial metabolism Basic...

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