Question

8. Why are plasma membranes arranged as a bilayer rather than a monolayer? (1)​

Answer 1

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Answer 2

Phospholipids, arranged in a bilayer, make up the basic fabric of the plasma membrane. They are well-suited for this role because they are amphipathic, meaning that they have both hydrophilic and hydrophobic regions. Chemical structure of a phospholipid, showing the hydrophilic head and hydrophobic tails