• What is the structure of the cell membrane and what unique properties does it have?
• How do these properties relate to how it works?
• What ordinary substances can be used to model the structure and functioning of the cell membrane?

Using a mixture of dish soap, corn syrup and water, with wire, string, straws, demonstrate the concepts of 

• structure of membranes starting with structure of soap
• fluidity/flexibility of membranes
• self-repair/movement through or across membranes
• lateral movement through membranes (as in trans-membrane proteins)
• prokaryotic vs. eukaryotic cells (creating a bubble/membrane within a bubble membrane)

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