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| style="height:20px; width:200px; text-align:center;" |The '''cell wall''' of a [[bacteria]] protects it from the immune system.
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===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/0198359373/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359373&linkCode=as2&tag=nrjc-21&linkId=952a73bbb09d222ecc4b50d200679849 ''Cell walls, pages 7-8, 94, GCSE Biology; Third Edition, Oxford University Press, AQA '']