Diffusion Process Quiz
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Questions and Answers

What is diffusion?

  • The movement of substances from higher to lower concentration (correct)
  • The movement of substances within the same concentration
  • The movement of substances from lower to higher concentration
  • The movement of substances independent of concentration

    • What factors affect the rate of diffusion?

  • Concentration gradient, size of the molecules, color of the substance, and shape of the container
  • Concentration gradient, permeability of membrane, temperature, and pressure (correct)
  • Concentration gradient, solubility of the substance, pressure, and size of the molecules
  • Concentration gradient, presence of catalysts, color of the substance, and temperature

    • What is the typical speed at which a molecule can cross a typical plant cell?

  • About 50 micrometers in about 2.5 seconds (correct)
  • About 75 micrometers in about 3 seconds
  • About 25 micrometers in about 5 seconds
  • About 100 micrometers in about 1 second

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