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Latest Biology A Level Ocr 100% (400+ Questions With Verified Solutions 2023/2024
What is the MAIN role of membranes and what are the other roles? - ANSWER - 
COMPARTMENTALISATION 
-site of chemical reactions 
-cell signalling 
-cell adhesion 
How do cell membranes compartmentalise? - ANSWER Membranes are hydrophobic layers that 
separate different regions of substances dissolved in water. This hydrophobic layer acts as a barrier 
preventing the movement of hydrophilic molecules from one region to another. It keeps one 
compartment separate from another. 
What are the 3 examp...