character: Sam the Chemist
topic: Phospholipid Bilayer
grade: 9
subject: Science
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character: Sam the Chemist
topic: Cell Membrane Structure
grade: 9
subject: Science
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character: Sam the Chemist
topic: Membrane Proteins
grade: 9
subject: Science
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character: Sam the Chemist
topic: Diffusion and Osmosis
grade: 9
subject: Science
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