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Biochemistry Flashcards

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5261603984__, __, __, __ make up 96% of living thingsC H O N0
5261615790__, __, __, __ most of the remaining 4%P S Ca K1
5261620917Trace ElementsRequired; minute amounts Fe, I2
5261632791Atomic Number# of protons # of electrons in a stable atom of an element3
5261642303Atomic MassSum of protons and neutrons Electron mass is small and almost negligible4
5261658599Atoms bond in order to fill...valence shell5
5261660911Octet RuleMost atoms "want" 8 valence electrons and will share, steal, or give away electrons in order to fill valence shells6
5261673482Octet Rule Exceptionsthose w/ <6 total electrons7
5261680550Covalent BondingValence electrons shared Form molecules Single, double, triple bonds possible8
5261690226Nonpolar CovalentElectrons are shared equally O29
5261692535Polar CovalentElectrons are not shared equally The more electronegative atom exerts a greater pull on the electrons being shared H2O10
5261711256In biology ___ bonds are considered strongerCovalent11
5261717455Ionic BondingElectrons are lost or gained from the outer shell in order to fulfill the octet rule Water can dissociate ionic bonds easily12
5261734884Hydrogen BondingWeak bonds formed between molecules that contain polar covalent bonds13
5261741346Molecular Structure vs FunctionEach molecule has a characteristic size and shape which determine its function14
5261759793CohesionSticks together15
5261759794AdhesionSticks to other things16
5261759851High surface tensionwater feels solid when you hit it bonds tighten17
5261765401High specific heatAmt of heat absorbed or lost to change 1g of substance by 1 degree C REsists temp change Keeps earth w/in viable temp limits18
5261799034Water also has ____ & _____High heat of vaporization, evaporative cooling19
5261807001Density of iceless dense than liquid H bonds freeze and force molecules further apart in large bodies of water, top layer of ice insulates water below20
5261819771Water is most dense at4 degrees C21
5261831399Universal solventdissolves materials creating aqueous solutions22
5261842253Water= ____ What's being dissolved = _____Solvent, solute23
5261849952Direct result of water's polarityHydrophilic Hydrophobic24
5261856713Water pHPure water (H+) concentration (OH-) Adding acids or bases changes concentrations quickly25
5261872792pH is the measure of ____.hydrogen ion concentration 0-1426
5261876190AcidsDonate H+ ions The more acidic a solution higher H+ concentration taste: sour27
5261884716BasesSome donate OH- ions Basic solution: lower H+ concentration, higher pH value taste: bitter28
5261898503BufferResist changes in pH Many in body (even minor changes can be life threatening) Blood: 7.429
5261913524HydrocarbonsCombinations of C & H Nonpolar not soluble in H20 hydrophobic stable little attraction between molecules gas at room temp30
5261929280IsomersMolecules with some molecular formula but different structure31
5261938537Isomers have different ____ & ______.Chemical properties, Biological functions32
5261950371Organic compoundscontains carbon chains divided into 4 families33
5261965825Functional GroupsParts of organic compounds most commonly involved in chemical reactions Determine what bonds will be formed and functions of specific compounds34
5261978386Hydroxyl-OH Organic compounds with OH- alcohols Names typically end in -ol ex. ethanol35
5262009560CarbonylC=O Aldehyde and Ketone36
5262018743Aldehydeend of molecule (double bond)37
5262018744Ketonemiddle of molecule38
5262037551Carboxyl-COOH compounds with this: acids ex. fatty and amino acids39
5262043142Amino-NH2 compounds with this: amines ex. amino acids acts as a base ammonia picks up H+ from solution40
5262059574Sulfhydryl-SH Stabilize the structure of proteins41
5262067421Phosphate-PO4 Increases gene expression lots of O= lots of negative charge highly reactive transfers energy between organic molecules42
5262092282CarbohydratesProvide energy ex. candy, sugar, pasta, bread43
5262099077Carbohydrates contain ___ & ___hydroxyl and carbonyl44
5262104990Three groups of carbohydratesMonosaccharides Disaccharides Polysaccharides45
5262113926_____ are the bodies first choice of energycarbohydrates constant surplus, everything else will be stored up (cause weight gain)46
5262122422MonosaccharidesCarb monomer ex. glucose and fructose Formula CH2O47
5262134358DisaccharidesDouble sugars ex. sucrose, lactose, maltose formed by dehydration synthesis48
5262148589Glycosidic linkagebond formed between monosaccharides49
5262153676Dehydration synthesisMonosaccharide + monosaccharide -> disaccharide + water50
5261759727MethylCH351
5268822979Carbon forms ___4 bonds52
5268825873Hydrogen forms ___1 bond53
5268828635Oxygen forms ____2 bonds54
5268831364Nitrogen forms ____3 bonds55
5268854430Polysaccharidescomplex56
5268856941Polysaccharide examplesstarch, cellulose, glycogen57
5268865358Polysaccharides are ___ & _____ ______ for energystored and broken down58
5268875726What is added to break polysaccharides apart?Water59
5268879824Polysaccharide: CelluloseMost abundant organic compound on earth Indigestible roughage60
5268894413Herbivores evolved mechanism to digest ___. Most carnivores have notcellulose61
5268901131Indicators of CarbohydratesBenedict's solution Iodine62
5268906819Benedict'sBlue to orange in monosaccharide63
5268908939Iodineamber to black in polysaccharide64
5268917733Lipidshydrophobic smaller than true polymers varied in form and function65
5268930568Types of lipidsfats, phospholipids, steroids, waxes and oils66
5268934681Lipid MonomerFatty Acids and Glycerol67
5268937436Fats: monomers examplesglycerol, fatty acids68
5268945476Ester linkagebond between fatty acids and glycerol formed by dehydration synthesis69
5268961253Fats function in energy _____ & _____.storage and protection70
5268967423Saturatedsolid @ room temp71
5272242271Saturated fats examplesbutter, coconut oil, animal fats72
5272275119Saturated fats bondsNo double bonds between carbons73
5272278760UnsaturatedLiquid @ room temp74
5272282893Unsaturated ex.Plant oils75
5272286291Unsaturated fats bondsDouble bonds between carbons (do not have max # of hydrogens)76
5272295983PhospholipidsSimilar to fats but w/ 2 fatty acids rather than 377
5272303686Phospholipids OH group3rd -OH group of glycerol joined to -PO4 group78
5272313216Phospholipids and waterAmbivalent behavior toward water (likes and dislikes)79
5272318679Phospholipid tailshydrophobic80
5272328095Phosphate headsneg charge and hydrophilic81
5272330053Phospholipids componentmajor component of cellular membranes82
5272340223Steroidscarbon skeleton of 4 fused rings83
5272343600Steroid useanimal cell membranes and hormones84
5272364802Protein monomersamino acids85
5272381352Proteins containamino and carboxyl groups86
5272385276Protein usesupport storage transport signaling immunity metabolism87
5272391383Protein structuresophisticated in structure and function88
5272395735Protein accounts formore than 50% of dry weight89
5272406078Amino Acid groupsamino, carboxyl, R-group90
5272413782Amino acid R-groupvariable groups different for each amino acid91
5272422131R-group propertiesunique chemical properties to each amino acid92
5272434321PeptidesIndividual amino acids or Sequence of 2+ aminos created by dehydration synthesis93
5272442546Peptide bondbetween amino acids94
5272451161Primary protein structureUnique sequence; has to be exact sequences95
5272451162Primary protein examplehemoglobin normal vs sickled insulin96
5272454683Secondary protein structureinitial coiling and folding patterns that result from hydrogen bonds97
5272454684Secondary protein examplealpha helix - coils pleated sheet - folds98
5272459550Tertiary protein structureSecondary coiling and folding99
5272463104Quaternary protein structureOverall protein structure that comes from the way all the polypeptide subunits are situated100
5272508232Structure of proteins affected bypH salt concentration temp other environmental factors101
5272520146When protein structure changesfunction changes (denatured= inactive)102
5272529195Protein denaturationUnfolding a protein, destroys functionality103
5272536107Denaturing conditionsdisrupt H bonds, ionic bonds, disulfide bridges104
5272549708Sickle cell anemiafolds are different longer spread out protein hydrophobic105
5272556306Biuretsindicator of protein blue -> violet in protein106
5272565633Nucleic AcidsStore and transmit hereditary information107
5272567625Nucleic Acid exDNA, RNA108
5272574840Phosphodiester bondbond between nucleotides109
5272577604Nucleotides containsugar, phosphate group, nitrogen base (A,T,C,G)110
5272592029Eat to make moreDNA, RNA111
5272618288Metabolismtotal amount of organism's chemical processes and reactions112
5272621129catabolicbreakdowns (molecules) release energy113
5272625618catabolic excellular respiration where glucose is broken down and ATP is released, digestion114
5272631607anabolicreactions that build complex molecules from simpler ones requires energy input115
5272634049anabolic exsynthesis of proteins from amino acids116
52726447921st law of thermodynamicsEnergy can be transferred and transformed, but neither created nor destroyed117
52726533322nd law of thermodynamicsEvery energy transfer makes universe more disordered (entropy)118
52726589312nd law exampleheat is energy in its most random state119
5272664637Free energyavailable for work represented: G120
5272677112ExergonicRelease free energy catabolic121
5272680050Exergonic excellular respiration122
5272682527Endergonicabsorbs free energy anabolic123
5272686598Endergonic exphotosynthesis (input of solar energy)124
5272693512Mechanical cellular workmovement ex. muscle contractions125
5272695971Transport cellular workpumping of substances across membranes126
5272695972Chemical cellular workpushing of endergonic reactions that do not occur spontaneously ex. dehydration synthesis127
5272711518ATPEnergy molecule used to power cellular work128
5272724580Cause of release of free energyhydrolysis of last phosphate group129
5272731014Renewable molecule ATPregenerated by addition of phosphate group of ATP130
5272736876ATP contains3 phosphate groups @ end131
5272742945Competitive inhibitionanother molecule competes directly for enzyme active site and blocks substrate attachment (fits in active site)132
5272751227Noncompetitive inhibitionMolecule attaches enzyme somewhere other than active site changes active site shaping preventing attachment to substrate133

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