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Biochemistry Flashcards

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7841251350Elements25 required for life C,H,O,N make up 96% P,S,Ca,K 4%0
7841251351Trace ElementsFe, I-required in minimal amounts1
7841251352GoitersSwelling of the thyroid gland caused by an iodine deficiency2
7841251353Atomssmallest unit of matter.3
7841251354Protons+ in an atom's nucleus4
7841251355Neutrons+/_ in an atom's nucleus5
7841251356Electrons- in an atom's outer ring6
7841251357Atomic Number# of protons. # of electrons in a stable atom of an element.7
7841251358Atomic massSum of protons and neutrons.8
7841251359Electron masssmall and almost negligible9
7841251360IonsDifferent # of Electrons. Atoms with a charge10
7841251361More electrons =negative charge11
7841251362Less Electrons=positive charge12
7841251363IsotopesDifferent # of neutrons, radioactive, diagnostic tracers13
7841251364Why do atoms bond?To fill their valence shell14
7841251365Octet RuleMost atoms want 8 valence electrons.15
7841251366Exceptions to the Octet RuleThose w/ <6 total electrons16
7841251367Covalent BondingValence electrons are shared.17
7841251368Ionic BondingLost or from the outside shell that fills the octet rule18
7841251369Hydrogen bondsBonds between molecules that contain polar covalent bonds.19
7841251370Molecular structuredetermines the job . ex- endorphins can be substituted with heroin because they both are the same exact shape in size/function.20
7841251371Polarityslight charge on either end of a molecule due to electronegatives21
7841251372cohesionproperty of water; sticks to itself22
7841251373adhesionsticking to something else; property of water23
7841251374surface tensionproperty24
7841251375high specific heatthe amount of energy absorbed or lost to change 1g 1degree celsius. water's specific heat is high25
7841251376iceless dense than water; insulates water below; is most dense at 4 degrees celsius26
7841251377universal solventwater dissolves materials creating aqueous solutions (water=solvent, being dissolved = solute)27
7841251378hydrophilicsubstances attracted to water28
7841251379hydrophobicrepel water29
7841251380pure water[H+]=[OH-]30
7841251381pHa measure of hydrogen ion concentration on a scale of 1-1431
7841251382Acidsdonate [h+] to solution32
7841251383more acidic =more [H+] and lower pH, pH<733
7841251384basesaccept [H+] ions from the solution; may donate [OH-]34
7841251385more basic equalsless H+ concentration; higher pH35
7841251386Bufferresists change to an acid or base. ex- blood stays at 7.4 because minor changes can cause death36
7841251387hydrocarbonsmolecules with C and H. nonpolar. hydrophobic. stable. little attraction between molecules37
7841251388Isomersame molecular formula but different structures, different chemical properties and molecular formuals.38
7841251389Thalidomidereduced morning sickness in pregnant women but a stereoisomer caused severe birth defects39
7841251390organic compoundscontain carbon. split in to carbs, proteins, nucleic acids, and lipids40
7841251391Functional groupsparts organic compounds used most often in chemical reactions. Determine structure and function41
7841251392hydroxylorganic compounds with OH- alcohols42
7841251393Carbonyl aldehydeC=O at the end of the molecule43
7841251394Carbonyl keytoneC=O in the middle of the molecule44
7841251395CarboxylCompounds with COOH- acids (fatty and amino)45
7841251396AminoCompounds with NH2 - amines (amino acids) NH2 acts as a base when ammonia pick us an H+46
7841251397phosphateLots of O=lots of neg charge- reactive transfers energy between organic molecules (ATP) increases gene expression47
7841251398Sulfhydrylstabilizes the structure of proteins48
7841251399Methylturns genes down or off49
7841251400CarbohydratesContain hydroxyl and carbonyl groups, provide energy.50
7841251401Three groups of carbohydratesmonosaccharide, disaccharide, polysaccharide.51
7841251402Monosaccharidemono- single, saccharide- sugar, formula CH2O(monomer) Ex-glucose, fructose52
7841251403DisaccharideDouble sugars, formed by dehydration synthesis, glycosidic linkage (bond between two monosaccharide) Ex- sucrose, lactose, maltose53
7841251404Polysaccharidecomplex sugars, stored and broken down by hydrolysis from energy. Ex-starch, cellulose, glycogen54
7841251405celluloseplant cell wall; not easily broken down; rigid structure; most abundant organic compound on Earth- can be digested by herbivores55
7841251406starcheasily broken down by hydrolysis; flat structure; easily digested56
7841251407Carbohydrate IndicatorBenedicts- blue to orange in a monosaccharide Iodine- turns amber to black in a polysaccharide57
7841251408LipidsHydrophobic, smaller than polymers, highly varied in form and function58
7841251409Types of lipidsfats, phospholipids, steroids, waxes and oils59
7841251410Fatsmonomers- fatty acids/glycerol, function in storing energy and protection, Ester linkage-bond between fatty acids and glycerol60
7841251411Saturated Fatssolid @ room temps, animal fats, build up inside of vessels, no double bonds between carbons. Saturated with hydrogens. straight structure61
7841251412Unsaturated fatsliquids at room temp, plant oils, double bonds between carbons. bent sort of like a V structure62
7841251413PhospholipidsLike fats but with 2 fatty acids instead of 3; 3rd OH group of glycerol joined to PO4 group, ambivalent toward water. component in cellular membranes63
7841251414Steroidscarbon skeleton with 4 fused rings; used in animal cell membranes and hormones64
7841251415ProteinsOne or more polypeptides folded and coiled into specific conformations sophisticated in both structure and function, accounts for more than 50% of cells dry weight, used in support, storage, transport, signaling, immunity, metabolism65
7841251416Stricture of an Amino AcidAmino group, central carbon, carboxyl group, r group66
7841251417R groups in Amino AcidsNon-polar=hydrophobic Polar=hydrophilic67
7841251418Sulfur containing Amino Acidsform disulfide bridges- covalent cross links between sulfhydryls, stabilizes 3-D structure68
7841251419Peptidesamino acid or acids created by dehydration synthesis69
7841251420peptide bondbond between amino acids70
7841251421Protein monomer and functional groupsmonomer- amino acid, contain amino and carboxyl groups,71
7841251422Primary structuresequence of amino acids72
7841251423Secondary structureinitial coiling and folding patterns that result from hydrogen bonds ex- alpha helix and pleated sheet73
7841251424Tertiary structuresecondary coiling and folding74
7841251425quaternary structureoverall structure that comes from the way they all polypeptides are situated75
7841251426Conformations and structure of proteins are affected bypH, Temp, environment, salt concentration76
7841251427structure change =function change (denatured and inactive)77
7841251428Protein DenaturationUnfolding a protein- disrupting h bonds, ionic bonds, and disulfide bridges Altering second and third structure destroys functionality78
7841251429Things that disrupt H bonds, Ionic bonds, disulfide bridgespH, temp, salinity79
7841251430alter second and third structurealter 3-d structure80
7841251431Destroys functionalitysome proteins can return to their functional shape after denaturation, many cannot81
7841251432sickle cell anemiamutation on the 6th where the gene is hydrophobic instead of hydrophoillic making it hard to travel through the blood stream82
7841251433Indicator of ProteinBuriets; blue to violet83
7841251434Nucleic AcidsStore and transmit hereditary information84
7841251435monomer for nucleic acidsnucleotides (ACTG) sugars- deoxyribose, ribose (DNA,RNA)85
78412514363 parts of NucleotidesNitrogen base (C-N ring) Pentose sugar (5C)- RNA, DNA Phosphate group86
78412514372 types of nucleotidespurines- double n ring base, adenine, guanine Pyrimidines- single N ring base, cytosine,thymine, Uracil87
7841251438Pairing of nucleotidesbond between DNA A to T C to G88
7841251439Nucleic Polymerbackbone- sugar to PO4 bond- phosphodiester bond. Nbases hang off.89
7841251440Indicator of fatpaper towel test90
7841251441Enzymeslower activation energy, have specific active site that fits the substrate, rate at which they work depends on temp ph and concentration of substrate91
7841251442catalystsspeed up reaction without being consumed or changed by the reaction92
7841251443MetabolismTotal amount of an organisms chemical processes and reaction. Catabolic + Anabolic reactions93
7841251444Catabolicbreak down molecules, release energy ex- cellular respiration94
7841251445Anabolicreactions that build complex molecules from simpler ones. requires energy input ex- synthesis95
78412514461st law of thermodynamicsconservation of energy96
78412514472nd law of thermodynamicsenergy transfer makes the universe more disordered Entropy ex- heat is energy in its most random state97
7841251448Free EnergyG, energy available to do work when temperature is uniform throughout.98
7841251449Exergonicreleases energy -deltaG catabolic reaction99
7841251450Endergonicabsorbs free energy +deltaG anabolic reaction100
7841251451Cellular WorkMechanical, transport chemical101
7841251452Mechanical cellular workmovement- muscle contractions102
7841251453Transport cellular workpumping of substances across the membrane103
7841251454chemical cellular workpushing endergonic reactions that do not happen spontaneously Ex- dehydration synthesis104
7841251455ATPAdenosine Triphosphate, made of phosphate, ribose, adenosine105
7841251456competitive inhibitionfighting for active sight106
7841251457Non-competitive inhibitionmolecule attaches somewhere else and changes the shape of the active site107
7841251458DNA MoleculeDouble Helix- h bonds between bases join the 2 strands A-T C-G108

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