BIOL 112 Lecture Notes - Lecture 7: London Dispersion Force, Glycerol, Chemical Polarity
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BIOL 112 Full Course Notes
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Lipids and proteins can more freely in the plane of the membrane. Phospholipids: have an amphipathic nature: polar head group (phosphate group, glycerol) hydrophilic, two non-polar tails (one kinked) hydrophobic. Intermolecular forces: london dispersion forces pd-id, id-id. What types of forces would you find between . Could create hydrogen bonds with the charged group, pd- Permanent dipole-induced dipole forces though most likely they would not touch very much to form bonds. The types of bonds contribute to the enthalpy of a system. Lipid bilayer: made up of two layers of phospholipids arranged according to the hydrophilic/hydrophobic nature of the heads and tail groups. Intermolecular forces: are weak (much weaker than intramolecular forces), but lots of them hold molecules together: molecules that have complementary shapes and chemistry (charge and bond polarity) will have lots of non-covalent interactions to keep them together longer. The process of creating phospholipid bilayers in spontaneous in water because the hydrophilic and hydrophobic ends arrange to have.
