Cell Membrane Models Quiz
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Questions and Answers

What did Hugh Davson and James Danielli propose in 1935?

  • A model with membrane proteins exposed to water
  • A mosaic model with proteins dispersed within the bilayer
  • A model with proteins embedded in the hydrophobic regions of the bilayer
  • A sandwich model with the phospholipid bilayer between two layers of globular proteins (correct)

    • What was the main problem found with the sandwich model proposed by Davson and Danielli?

  • Placement of membrane proteins with hydrophilic and hydrophobic regions (correct)
  • Lack of clarity on the role of phospholipids
  • Exposure of membrane proteins to water
  • Incompatibility with the fluid mosaic model proposed later

    • According to S. J. Singer and G. Nicolson, how is the membrane structured?

  • A sandwich model with phospholipids between protein layers
  • A model with membrane proteins exposed to water
  • A mosaic of proteins dispersed within the bilayer (correct)
  • A model with proteins embedded in the hydrophobic regions of the bilayer

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