BIOL 1105 Lecture Notes - Lecture 5: Peripheral Membrane Protein, Fluid Mosaic Model, Lipid Bilayer
14 Nov 2017
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Document Summary
3 of 4 classes play specific rolls in the cell membranes (proteins, carbs, and lipids) Carbs protect the outside of the cell and serve as markers for the cell. Lipids are mainly made up of triglycerides(3 fatty acids and a glycerol) Considered saturated if there are no double bonds. Considered unsaturated if there are no double bonds. All lipids have a hydrophilic head and hydrophobic tails. Glycerol can connect the head to the tails. Phospholipids are amphipathic (which means hydrophobic tails and hydrophilic head) In a water based environment the phospholipids cluster into large groups to protect hydrophilic tails (shaped like a circle) Heads form hydrogen bonds with the water molecules while the tails come together to hide from the water. The bilayer is held together completely by noncovalent interactions. Carbon tails come together and heads come in contact with water on both sides. Continuous sheets protect the inside of the bilayer.
