BIOL 4350 Lecture Notes - Lecture 31: Osmosis, Micelle, Trachea
22 Apr 2017
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Something that is hydrophobic: got a very high ratio of hydrocarbon in it, carbon and hydrogen have roughly equal electronegativity, bonds between them are equally shared and nonpolar, not a charge differential to the molecule. No structural formula that makes something a lipid. Cholesterol: polar head group is the part that is facing the water. Ubiquinone (q: diffusible in the membrane. Functions: storage of energy, reduced compounds: lots of available energy, hydrophobic nature: good packing. Lipids can provide pigments: absorb wavelength light and emit light at a different wavelength. Steroid hormones: built using the main cholesterol ring structure and slightly modified, cortisol, type of steroid hormone. Lipids can be electron carriers (ubiquinone), pigments, signaling molecule (steroid molecules) Highest energy source: highest energy electron is the farthest from the nucleus, when an electron is far from a nucleus, there is more potential energy, hydrocarbon bonds are the highest energy bonds.
