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Lecture 3 - biomolecules and can be altered Nucleotides –...

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Describe covalent bonds that link monomers to form biomolecules Sugars – glycosidic bonds, covalent bonds between 2 sugars, condensation reaction eliminates water Fatty acids and lipids – linked by covalent ester bonds, bond formation removes water Amino acids – covalent bonds between –NH 2 and –COOH (Peptide Bonds) Explain levels of structure found in macromolecules In proteins – 1) amino acid sequence 2) alpha helix and beta-pleated sheet 3) globular 4)takes 2 or more globulars Denaturation – reversible Coagulation – irreversible Describe how weak bonds, like hydrogen bonds, maintain the structure of polymeric
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Unformatted text preview: biomolecules and can be altered Nucleotides – RNA single chain, DNA two chains opposite (anti-parallel, complementary) H-bonds in middle Need Pyrimidine and Purine A-T 2 H-bonds C-G 3 H-bonds Describe the molecular composition of a typical microbial cell by kind of macromolecule 70% water and 30% chemicals (of the 30% - proteins, RNA and ions make up most) Polysaccharides – 5,000 <10 types Lipids – 25,000,000 <10 types Proteins – 25,000,000 ~2,500 types RNA – 250,000 ~600 types DNA – 2 =1 type...
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