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How do bacteria and Archaea exhibit extensive, and often unique, metabolic diversity?

Topic

Metabolism

Framing Question

How do bacteria and Archaea exhibit extensive, and often unique, metabolic diversity?

Learning Objectives

  • List two differences between substrate-level phosphorylation and oxidative phosphorylation.
  • Describe how aerobic respiration differs from anaerobic respiration.
  • State the difference between oxygenic and anoxygenic photophosphorylation.
  • Given an energy source and a carbon source, determine the metabolic lifestyle of an organism (e.g., chemoheterotroph, chemolithoautotroph, photoheterotroph, or photoautotroph).
  • Given energy demands and available substrates, predict which metabolic pathways a cell could use.
  • Given the major components of an electron transport chain, put them in order and explain how it could generate a proton motive force for the cell.
  • Design a mechanism that would allow a bacterium to protect its nitrogenase from oxygen.
  • Analyze the symbiotic relationship that some N2-fixing bacteria have with plants. Identify what the bacteria contribute and what the plant contributes.
  • Describe the process of methanogenesis in terms of electron transport and energy generation.

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