A Self-Test on Cell Membranes

1. The molecules which make up the backbone of the cell membrane are called

  1. Cholesterol
  2. Protein
  3. Phospholipid

2. Channels and carriers are necessary because they make the membrane

  1. Fluid
  2. Permeable to ions
  3. Stronger

3. Polar substances tend to

  1. Like water
  2. Find oil and water equally compatible
  3. Like oil

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