BIOL 1010 Lecture Notes - Lecture 4: Conformational Change, Blood Type, Alpha Helix
14 Aug 2018
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Document Summary
What there made of and how they work. How it acts at a barrier and allow and permit specific molecules to go trough. Perspective 25 nm of microtubule 1/3 of thickness of cytoskeleton. Compartmentalization separate functions and chemical reactions, different organelles specialised selective permeable barrier. Lipids (phospholipids and cholesterols) = 50% - made in the smooth er. Carbohydrates - not as key as the other ones: phospholipid. Phosphate group + small variable molecule (change the identity of every phospholipid) has a charge to it (=polar) Glycerol backbone (orange) 3 carbons in length. Will spontaniously from 2 layers in water = phospholipid bilayer. Fatty acid tails (hydrophobic) swing in the middle. Heads interact with the outside or the cytoplasm. Saturated fats = all single bonds = pact tightly (tails have no bend) Unsaturated fats = have double bonds = have a kink = more movement (not as tight) Not all membranes have the same portion of saturated/unsaturated fats.
