AS AQA Biology: Vesicles and Summary of Cell Transport

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Vesicles and Summary

The processes explained prior to this sheet only apply to small molecules. Large molecules and sometimes whole cells are moved in and out of cells using membrane vesicles.


This is the transport into the cell, materials are enclosed by a fold in the membrane and this then pinches shut to form a closed vesicle. Technically, the material has not yet breached the membrane so it is usually digested and the small molecules dealt with as described in earlier sheets. When the materials and the vesicles are small (such as


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