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Nutritional Classes of Microorganism

Nutritional Classes of Microorganism. Agustin Krisna Wardani. Nutritional Classification of microorganism. depend on : - source of carbon - how to generate energy ( ATP and reducing power). Carbon sources:

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Nutritional Classes of Microorganism

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  1. Nutritional Classes of Microorganism Agustin KrisnaWardani

  2. Nutritional Classification of microorganism depend on : - source of carbon - how to generate energy ( ATP and reducing power)

  3. Carbon sources: Heterotroph – must obtain carbon in an organic form made by other living organisms such as proteins, carbohydrates, lipids and nucleic acids Autotroph - an organism that uses CO2, an inorganic gas as its carbon source not nutritionally dependenton other living things 3

  4. Organic nutrients- contain carbon and hydrogen atoms and are usually the products of living things methane (CH4), carbohydrates, lipids, proteins, and nucleic acids Inorganic nutrients– atom or molecule that contains a combination of atoms other than carbon and hydrogen metals and their salts (magnesium sulfate, ferric nitrate, sodium phosphate) 4

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  6. Types of -trophs

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  8. Formation Precursor Metabolites by autrotrophs • Make precursor from CO2 create organic molecules from an inorganic gas. ex: plants (as autotrophs) use CO2 to create organic molecules to grow. • Have special metabolic pathway (not found in heterotrophs) Calvin-Benson cycle • I molecule CO2  organic molecule (phosphoglyceraldehide) • 2 precursor metabolites is produced • 10 precursor metabolites from glycolysis, TCA cycle, PP

  9. No ATP and reducing power (they need 3 ATP and 2 NADPH for CO2 fixed)  thus, another way to generate ATP • ATP generate from sunlight (photoautotrophs) and inorganic compound (chemoautotrophs)

  10. Autotrophs • Central metabolism + Calvin-Benson cycle  12 precursor metabolites

  11. Photoautotrophs • Generate ATP from photosynthesis: 1. Oxygenic (oxygen producing) photosynthesis 2. Anoxygenic (not oxygen-producing)photosynthesis • Chlorophyl  convert light energy into chemical energy

  12. Anoxygenic photosynthesis • Light energy  activate the electron from chlorophyll  flow through electron transport  ATP • Electron rejoin the chlorophyll in unactivated state • Chlorophyll served as electron donor and electron acceptor cyclic photophosphorylation

  13. Oxygenic photsynthesis • Generate ATP and reducing power from light energy by process of oxygenic photosynthesis. • 2 different chlorophyll molecules (photosystem I and II) • Water is also source of electron • Step 1: Light chlorophill (in Photosystem II) electron transport system  ATP  • Step 2: electron joined to photosystem I  light  2nd transport system  NADPH

  14. Chemoautotrops • By oxidation of several inorganic compound • They remove electron from inorganic substrate  transport system  ATP

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