IB Biology B2.1 Membranes and Membranes Study guides, Class notes & Summaries
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IB Biology B2.1 - Membranes and Membranes Transport Questions And Answers Rated A+
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IB Biology B2.1 - Membranes and 
Membranes Transport Questions And 
 
Answers Rated A+ 
 
Why do cells need membranes? • To distinguish itself from its surroundings 
• To be selective about what gets in and out 
 
How do lipids assemble to form a semipermeable membrane? Being cylindrical, 
phospholipid molecules spontaneously form bilayers in aqueous environments. In this 
energetically most-favorable arrangement, the hydrophilic heads face the water at each surface of 
the bilayer, and the ...
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