Q:

Diffusion is the term given to the process where:

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Diffusion is the term given to the process where:


  1. molecules move along their concentration gradient from high concentration to low concentration.
  2. water moves along its concentration gradient from low concentration to high concentration.
  3. ATP is used to move ions along their concentration gradient.
  4. a membrane protein, by changing shape after binding to a molecule, moves the molecule across the plasma membrane.

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A: This is the only correct definition of diffusion.

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