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Chapter 5, part C

Chapter 5, part C. Microbial Metabolism. Feeding methods. Feeding methods. Feeding methods. Phototroph - uses light for energy Chemotroph - uses chemical reactions for energy Autotroph - takes in CO 2 for carbon source Heterotroph - takes in organic compounds for carbon source

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Chapter 5, part C

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  1. Chapter 5, part C Microbial Metabolism

  2. Feeding methods

  3. Feeding methods

  4. Feeding methods • Phototroph - uses light for energy • Chemotroph - uses chemical reactions for energy • Autotroph - takes in CO2 for carbon source • Heterotroph - takes in organic compounds for carbon source • Photoautotroph • Energy from light / carbon from atmosphere • Photoheterotroph • Energy from light / carbon from organic compounds • Chemoautotroph • Energy from chemical reactions (inorganic) / carbon from atmosphere • Chemoheterotroph • Energy from organic compounds / carbon from organic compounds

  5. Feeding methods

  6. Chemotrophs • Obtain energy from compounds - chemicals. • Chemoheterotroph • Energy is used in anabolism. Glucose NAD+ ETC Pyruvic acid NADH ADP + P ATP

  7. Chemotrophs • Obtain energy from chemicals. Carbon from atmosphere not from compounds “eaten” • Chemoautotroph, Thiobacillus ferroxidans • Energy used in the Calvin-Benson cycle to fix CO2. 2Fe2+ NAD+ ETC 2Fe3+ NADH ADP + P ATP 2 H+

  8. Phototrophs Chlorophyll • Use light energy. • Photoautotrophs use light energy in the Calvin-Benson cycle to fix CO2 . And make sugars to use for energy • Photoheterotrophs use light energy and organic compounds. ETC Chlorophylloxidized ADP + P ATP

  9. Metabolic Diversity Among Organisms

  10. Metabolic Pathways of Energy Use • Polysaccharide Biosynthesis Figure 5.28

  11. Lipid Metabolic Pathways • Lipid Biosynthesis • Lipid Catabolism • Beta oxidation • 2 carbons at a time make acetyl groups Figure 5.29

  12. Metabolic Pathways of Energy Use • Amino Acid and Protein Biosynthesis Figure 5.30a

  13. Metabolic Pathways of Energy Use • Amino Acid and Protein Biosynthesis Figure 5.30b

  14. Metabolic Pathways of Energy Use • Purine and Pyrimidine Biosynthesis Figure 5.31

  15. Amphibolic pathways • Are metabolic pathways that have both catabolic and anabolic functions. Figure 5.32.1

  16. Amphibolic pathways Figure 5.32.2

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