character: Mr. Johnson
topic: Cell Membrane Structure
grade: 9
subject: Biology
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character: Dr. Smith
topic: Cell Transport Mechanisms
grade: 9
subject: Biology
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character: Ms. Lee
topic: Differences Between Plant and Animal Cells
grade: 9
subject: Biology
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character: Mr. Brown
topic: Fluid Mosaic Model of Cell Membranes
grade: 9
subject: Biology
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