character: Cell Membrane Structure
topic: The structure of the cell membrane, including the phospholipid bilayer and embedded proteins.
grade: 9
subject: Science
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character: Proteins in Membrane Transport
topic: The role of proteins in facilitating the transport of substances across the cell membrane.
grade: 9
subject: Science
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character: Passive Transport
topic: How substances move across the membrane without the use of energy, including diffusion and osmosis.
grade: 9
subject: Science
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character: Active Transport
topic: The process by which cells move substances against their concentration gradient, requiring energy.
grade: 9
subject: Science
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