character: Mr. Brown
topic: Cell Membrane Functions
grade: 9
subject: Science
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character: Mrs. Green
topic: Structure of Cell Membranes
grade: 9
subject: Science
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character: Dr. Smith
topic: Transport Mechanisms in Cells
grade: 9
subject: Science
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character: Ms. White
topic: Cell Signaling and Membrane Receptors
grade: 9
subject: Science
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