Biosorption and Heavy Metals Consumption Quiz
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Questions and Answers

What is biosorption?

  • The breakdown of heavy metals by microbial cells.
  • The release of heavy metals into aqueous solutions.
  • The selective sequestering of heavy metals by living microbes.
  • The binding and concentration of heavy metals from aqueous solutions by microbial biomass. (correct)

    • Which countries consume about 75% of the world's most widely used metals?

  • Germany, Brazil, France
  • United States, Germany, Russia (correct)
  • India, China, Japan
  • United Kingdom, Canada, Australia

    • What specific gravity must a chemical element have to be classified as a heavy metal?

  • $\geq 3$ times the specific gravity of water
  • $\geq 2$ times the specific gravity of water
  • $\geq 7$ times the specific gravity of water (correct)
  • $\geq 10$ times the specific gravity of water

    • When do heavy metals become toxic?

    <p>When they accumulate in soft tissues</p> Signup and view all the answers

    Which of the following symptoms is NOT associated with heavy metal toxicity?

    <p>Enhanced memory recall</p> Signup and view all the answers

    Once dispersed in the biosphere, why are toxic metals said to be permanent in terms of environmental effects?

    <p>Because they cannot be recovered or degraded</p> Signup and view all the answers

    What is the main function of biosorption in the context of heavy metals?

    <p>Binding heavy metals to microbial biomass</p> Signup and view all the answers

    Why do heavy metals become toxic when they accumulate in the soft tissues?

    <p>Due to their inability to be metabolized by the body</p> Signup and view all the answers

    Which of the following elements is NOT classified as a heavy metal?

    <p>Copper</p> Signup and view all the answers

    What is the specific gravity range of heavy metals compared to water?

    <p>5.0 - 13.5</p> Signup and view all the answers

    Why are the environmental effects of metal pollution considered permanent?

    <p>Metals disperse in the biosphere and cannot be recovered or degraded</p> Signup and view all the answers

    Which of the following symptoms is commonly associated with heavy metal toxicity?

    <p>Chronic fatigue</p> Signup and view all the answers

    In which process do toxic metals like Chromium and Zinc cause environmental concerns?

    <p>Permanent dispersal in the biosphere</p> Signup and view all the answers

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