Why do phospholipids form a double layer?
Because phospholipids have 2 parts. One is hydrophilic, the other is hydrophobic, so when it wants to survive , it has to be 2 layer, hydrophilic parts are the outside parts.
Phospholipids are the class of lipids that is composed of a hydrophilic head and two hydrophilic tails derived from fatty acids that are joined with an alcohol residue.
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