Bacterial Superheroes

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Questions and Answers

What is the process of breaking down proteins in dead organisms and animal waste, releasing ammonium ions?

  • Nitrogen fixation
  • Nitrification
  • Ammonification (correct)
  • Denitrification

What is the two-step process of oxidizing ammonia or ammonium ions to nitrites and then to nitrates?

  • Nitrogen fixation
  • Nitrification (correct)
  • Ammonification
  • Denitrification

What is the process of reducing nitrates to nitrogen gas, returning nitrogen to the air and reducing the amount of nitrogen in the soil?

  • Nitrogen fixation
  • Nitrification
  • Ammonification
  • Denitrification (correct)

What is the special bacterium used to produce vinegar by fermenting beer, wine, or cider?

<p>Acetobacter (A)</p> Signup and view all the answers

What is the process of fixing nitrogen gas into forms other organisms can use?

<p>Nitrogen fixation (A)</p> Signup and view all the answers

What is the method of sewage treatment that relies on the action of microorganisms to oxidize organic matter present in sewage?

<p>Activated sludge method (B)</p> Signup and view all the answers

What are some industrial processes that use bacteria?

<p>Food and beverage fermentation, vinegar production, and antibiotic production (C)</p> Signup and view all the answers

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Study Notes

  • Bacteria play a key role in the nitrogen and sulfur cycles in ecosystems.
  • Bacteria are used in various industrial processes such as food and beverage fermentation, vinegar production, and antibiotic production.
  • Vinegar is produced by fermenting beer, wine, or cider with a special bacterium called Acetobacter.
  • Sewage treatment relies on the action of microorganisms to oxidize organic matter present in sewage.
  • There are two main methods of sewage treatment: percolating filter method and activated sludge method.
  • Bacteria are used to produce insulin, human growth hormone, enzymes for washing powders, and human vaccines.
  • Nitrogen fixation is the process of fixing nitrogen gas into forms other organisms can use.
  • Ammonification is the process of breaking down proteins in dead organisms and animal waste, releasing ammonium ions.
  • Nitrification is a two-step process of oxidizing ammonia or ammonium ions to nitrites and then to nitrates.
  • Denitrification is the process of reducing nitrates to nitrogen gas, returning nitrogen to the air and reducing the amount of nitrogen in the soil.

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