(2) Role of protein pumps and ATP in active transport across membranes

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(http://click4biology.info/c4b/2/Pic2.4/activeT.gif)

  • Molecules are moved against the concentration gradient from a region of their low concentration to a region of their high concentration.
  • Active mean that the membrane protein 'pump' requires energy (ATP) to function

  • The source of energy is ATP is produced in cell respiration

  • Transported molecules…

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