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Biochemistry Flashcards

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4791808295Water structure2 hydrogens covalently bonded to 1 oxygen0
4791820794Polarityopposite ends with different charges E.X. water, sugar, amino acids, proteins, nucleic acids1
4791826330Hydrogen Bondsweak bonds short lived important for water physical properties2
4791829942Cohesionwater is liquid in moderate temperatures caused by H-bonds causes surface tension b/c water is stuck together and all H bonds face down3
4791836993Adhesionwater is attracted to other polar molecules or substances which form H bonds water can move through polar tubes (glass living vessels) even against gravity called capilary4
4791847766High specific Heatamount of heat required to change 1 g of substance 1 degree C More Polar=more H bonds=Higher specific heat water heats and cools slowly good for organisms maintaining body heat5
4791856562Ice lower densityice is less dense than liquid water H bonds space water molecules apart6
4791865376Water as a solventwater surrounds substances with full ion or partial polar charge causing a hydration shell to form preventing molecules from rejoining7
4791871274Hydrophobicnon polar molecules wont form H bonds fears water8
4791874125HydrophilicWater loving polar molecules form H bonds water forms maximum H bonds possible9
4791888809Electrons H O N CH 1V 1E O 6V 8E N 5V 7E C 4V 6E10
4791897572HydrocarbonsMade from hydrogen and carbon nonpolar hydrophobic lots of energy stored11
4791902319Hydroxyl-OH or HO- alcohol, sugar, amino acids ends in -ol Polar hydrophilic makes organic compounds soluble12
4791908674Carbonyl-C=O aldehydes and ketones polar hydrophilic13
4791913569Carboxyl-COOH Amino acids and fatty acids carboxylic acids or organic acids E.X. formic acid or acetic acid acidic because of H+ Bond between O and H is polar dissociates easily hydrophilic14
4791931952Amino Group-NH2 called amines acts as a base can pick up proton H+ H+=proton Found in amino acids polar hydrophilic E.X. Glycerine has a carboxyl group amino acids have carboxyl and amino groups15
4791946033Sulfhydryl group-SH sulfur has 6 valence electrons forms 2 covalent bonds called thiols help to stabilize structure of protein found in amino acids polar hydrophilic16
4791952415Phosphate group-OPO3^2- formed from dissociation of phosphoric acid (H3PO4) function in transfering energy between organic molecules found in nucleic acids (DNA and RNA) polar hydrophilic17
4791977396Methyl group-CH3 Fats and lipids NONPOLAR HYDROPHOBIC18
4791982127MacromoleculesMostly polymers (except lipids) Long molecule Many similar or identical building blocks linked covalently Monomers 1 building blocks 2 small molecules 3 repeating units all macromolecules are formed and broken the same way19
4791992726Dehydration synthesistwo molecules covalently bonded to each other through the loss of a water molecule cell requires energy (ATP) enzymes needed for reaction to occur20
4792001319HydrolysisLysis=break polymers disassembled opposite of dehydration synthesis enzymes required for reaction E.X. digestion21
4792011597Lipids Characteristicsfats, oils and waxes no polymers hydrophobic some polar bonds mostly hydrocarbons (nonpolar) so soluble in organic solvents (gasoline) smaller than true macromolecules22
4792022578Fatty AcidsLong carbon skeleton non polar hydrophobic at one end, carboxyl group store energy cushions vital organs insulates23
4792041414saturated fatty acidsno double bonds between carbons saturated with hydrogen solid at room temperature all animal fats lard and butter24
4792050640unsaturated fatty acidsOne or more double bonds double bonds fromed by removing a hydrogen liquid at room temperature kink in H - C chain where double bond is kinks prevent close packing making it not a solid polyunsaturated= more than one double bond25
4792064262Hydrogenated vegetable oilsunsaturated converted to saturated by adding H H prevents lipids form seperating out in a liquid Ex peanut butter or margarine26
4792070877GlycerolBackbone of fat molecule an alcohol with 3 carbons each carbon has a hydroxyl group OH= alcohol27
4792081760Fats/ triglyceridesLarge molecules formed through dehydration synthesis made of 1 gylcerol and 3 fatty acids formed through ESTER linkage (bond between hydroxyl and carboxyl groups)28
4792097008Phospholipidssimilar to fats but two fatty acid tails one fatty acid replaced with a phosphate group other small molecules polar can be added to form other phospholipids tails are hydrophobic heads out in water tails in when in water29
4792106677SteroidsC skeleton with 4 fused rings different function groups attached ex cholesterol30
4792109820Monosaccharidessingle or simple sugars mono=1 CH2O formula most names end in -ose most sugars form rings in aqueous solutions major fuel for cellular network carbon skeletons are raw material for synthesis of other organic molecules if not used immediately incorporated into di or poly saccharides aldose or ketose is determined by location of carbonyl group and multiple hydroxyl groups31
4792136803AldoseC=O on end OH in middle Ex glucose32
4792142581ketoseC=O which is in middle OH on end Ex fructose33
4792147483DisaccharidesPolymer of monosaccharides formed by dehydration dynthesis glucose Glucose= maltose Glucose+ fructose= sucrose glucose+ galactose= lactose34
4792287308PolysaccharidesMacromolecule 100s to 1000s of monomers function determined by types of monomers and cation of glycosidic linkage35
4792298232Storage polysaccharidesall glucose all sugars in same direction helical amylose (starch) simplest unbranched plants(10-30%) amylopectin (starch) more complex branched plants(70-90%) glycogen stored in liver and muscle cells depleted in a day if not replenished animals36
4792321324structural polusaccharidesCellulose most abundant organic compound on earth major component of tough walls that enclose plants made of glucose differs from starch in location of glycosidic links every other sugar molecule is upsidedown molecule is straight never branched insoluble fiber few can digest (cows, termites, and some fungi) Chitin used to build exoskeletons in arthropods (insects, spiders, crustaceans) also in cell wals of fungi37
4792345156Chitin photo38

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