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360Science™: Cell Membrane Permeability


In this lab, students carry out an investigation to detect molecule movement across a semipermeable phospholipid membrane using a single-celled eukaryotic organism. In this experiment, students will observe the movement of the pH sensitive vital stain, neutral red, across the phospholipid membranes of yeast cells.


  • Cell membrane
  • Diffusion
  • Active transport
  • Acid–base indicators