BIOL 112 Lecture Notes - Lecture 4: Dna Replication, Double Bond, Ribose

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BIOL 112 Full Course Notes
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BIOL 112 Full Course Notes
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Main function of rna: intermediate between dna and protein (mrna) Some may have complex 3d structure: stem-loop structures. They also aid the formation of double stranded rna, which then evolves into double-stranded dna: dna becomes the primary molecule for information storage. Dna uses rna to make proteins, which in turn help with dna replication and transcription. Hydrophobic insoluble in water: results from the many nonpolar covalent bonds of hydrogen and carbon in lipids. Aggregate away from water (which is polar) Attracted to other lipids through weak van der waals forces. Glycerol + 3 fatty acid ester linkage triglyceride. Saturated fatty acids only single bonds, carbon to carbon: linear, usually animal fat, or partially hydrogenated vegetable oil, fat = solid. Have two hydrophobic fatty acids (tails) and one hydrophilic head attached to glycerol. Self-assemble into a bilayer: hydrogen bonding between head and water, hydrophobic interactions of tail.

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