Bacterial Biology Quiz
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Questions and Answers

What is a major source of phosphorus for bacteria?

  • Sulphur salts
  • Phosphate salts
  • Organic sulphur
  • DNA and RNA nucleotides (correct)
  • What happens to Fe+2 in the presence of O2?

  • It remains unchanged
  • It becomes insoluble
  • It is reduced to Fe3+
  • It is rapidly oxidized to Fe3+ (correct)
  • What is the purpose of siderophores in bacteria?

  • To oxidize Fe+2 to Fe3+
  • To bind Fe3+ in the environment and facilitate uptake by the cell (correct)
  • To secrete organic compounds for energy production
  • To reduce Fe3+ to Fe2+ inside the cell
  • What are the two types of culture media mentioned in the text?

    <p>Defined and complex media</p> Signup and view all the answers

    What are growth factors in the context of bacterial growth?

    <p>Preformed organic compounds required by the cell for growth but cannot be synthesized by the cell</p> Signup and view all the answers

    What is the purpose of culture media in microbiology?

    <p>To isolate pathogens and provide material for research</p> Signup and view all the answers

    What is the difference between defined and complex media?

    <p>Defined media provide all nutrients necessary for growth, while complex media have variable compositions</p> Signup and view all the answers

    What happens to Fe3+ in the presence of O2?

    <p>It forms insoluble compounds</p> Signup and view all the answers

    What are growth factors in the context of bacterial growth?

    <p>Preformed organic compounds required by the cell for growth but cannot be synthesized by the cell</p> Signup and view all the answers

    What is the major source of phosphorus for bacteria?

    <p>Organic phosphorus in DNA, RNA nucleotides, and phospholipids</p> Signup and view all the answers

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