BIOL 211 Lecture Notes - Lecture 3: Maltose, Central Dogma Of Molecular Biology, Uracil

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Most of the large molecules in organism fall into those four classes. The particular set of those molecules in an organism has strong influence on its structure and function. Macromolecule a really big molecule (roughly more than 1000 atoms: 4 types of really big molecules are nucleic acids, proteins, carbs and lipids, most proteins, nucleic acids and carbohydrates are macromolecules. Polymer a long, chainlike molecule consisting of many similar building blocks called monomers linked to each other by covalent bonds: all proteins, nucleic acids, and carbs are polymers. Proteins polymers made up of covalently bonded amino acid monomers. Nucleic acids polymers made up of covalently bonded nucleotide monomers. Carbs polymers made up of covalently bonded monosaccharide monomers. Lipids not polymers, rarely large enough to be considered macromolecules. Polymers are built by adding more monomers to the chain in dehydration reactions: monomers are joined by covalent bonds, reaction is usually facilitated by an enzyme, h2o molecule is released during the reaction.

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