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The cell membrane controls what enters and leaves the cell. There are protein channels within the lipid bilayer (membrane) of the cell. There are carbohydrate chains that hang off of the protein channels that identify each particle around the cell to make sure its what the cell needs, if not it wont let it in.

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7y ago
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11y ago

the plasma membrane

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12y ago

Cell membrane

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Q: What part of cell controls movement of molecules in and out of cell?
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