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Biochemistry 1 - AP Biology Flashcards

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4821191255Polar MoleculeAn asymmetrical molecule with a slight charge (dipole); that is hydrophilic (water loving) ex: water0
4821191256HydrophilicWater loving1
4821191257Nonpolar MoleculeA symmetrical or balanced molecule with no charge; hydrophobic (water fearing) ex: lipid2
4821191258HydrophobicWater fearing3
4821191259Properties of WaterIce is less dense than water Very polar High specific heat High heat of vaporization Universal solvent Strong cohesion property4
4821191260CohesionAttraction of water molecules to one another5
4821191261AdhesionAttraction of water molecules to other substances6
4821191262pHmeasure of concentration of hydrogen ions7
4821191263CarbohydratesConsist of carbon, hydrogen, and oxygen in a 1:2:1 ratio Polymers of monosaccharides Function: quick energy Ex: glucose, lactose, sucrose, maltose8
4821191264LipidsConsists of chains of carbon, hydrogen, and oxygen Hydrophobic Function: energy storage, structure, steroids, hormones9
4821191265SteroidLipid made of 4 carbon rings10
4821191266ProteinsConsists of S, P, C, O, H, and N R-group is variable region of amino acid Polymers of amino acids Function: many, including growth and repair11
4821191268Primary Structure (Protein)Determined by the amino acid sequence of the chain attached by peptide bonds12
4821191269Secondary Structure (Protein)Determined by intermolecular hydrogen bonding within the chain alpha helix and beta pleated sheets13
4821191270Tertiary Structure (Protein)3-D shape determined by the folding and interactions between amino acids (e.g., nonpolar, polar, disulfide bridges)14
4821191271Quaternary Structure (Protein)Determined by the interactions between 2 or more chains of polypeptides15
4821191272Nucleic AcidsRNA, DNA, ATP Polymers of nucleotides Nucleotides consist of sugar, phosphate, and nitrogen base16

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