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Biochemistry Flashcards

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7156204805BiochemistryThe study of chemistry of living things0
7156206040Macromolecules (large molecules)polymers of smaller molecules1
71562095394 major macromolecules groups in BiochemistryLipids, Nucleic acids (DNA & RNA), Proteins (amino acids), Carbohydrates (Glycans)2
7156210151LipidWater insoluble compound usually composed of a long hydrocarbon chain attached to an ester or phosphate group3
7156211580Lipids include:Fats (animals), Oils( Plants), Phospholipids4
7156212448Fatty acidCarboxylic acid with a long hydrocarbon chain, can be unsaturated or saturated5
7156213295FatsIn triglycerides obtained from animals, the fatty acids are mostly saturated and have few double bonds6
7156215573A semisolid lipid-triglyceride obtained from an animal source is afat7
7156217446A liquid lipid obtained from a plant source is aoil8
7156230279Soapsoup molecules hae a polar head and a long non polar tail9
7156230697Soap molecules are able to dissolveoil with the tail and the heads stick into water10
7156231192Phospholipidsglyceride found in living cells and membranes11
7156234035Function of lipidsImportant component of cell membranes, energy storage and raw material to make other molecules12
7156241790Nucleic AcidsBiochemical compounds found in every living cell13
7156241982Nucleic acids containgenetic information responsible for the reproduction of a species14
7156242896Nucleotidenucleic acid polymer composed of many repeating units known as15
7156243385Deoxyribonucleic AcidDNA16
7156243678Ribonucleic AcidRNA17
7156253906Nucleic acids are linearmacromolecules made of nucleotides18
7156254838A nucleotide containsa sugar molecule attached to an organic nitrogen- containing molecule and a phosphate group19
7156255293Phosphate linkagesattach units in a linearly20
7156257776Nucleotides consist of three similar component molecules:five carbon sugar, nitrogen containing base, molecule of phosphoric acid21
7156259224DNA hasan H22
7156259225RNA hasan OH23
7156262662DNA contains4 bases, Adenine, Cytosine, Guanine, Thymine24
7156263394RNA containsAdenine, Cytosine, Guanine, Uracil25
7156264317In DNA, an adenine on one strandALWAYS hydrogen bonds with a thymine on the other26
7156264585Cytosine ALWAYShydrogen bonds with guanine on the other strand27
7156265315Dr Franklin in 1952Discovered the X shape28
7156265317The double helixdiscovered in 195329
7156265922Polymerase chain reactionPCR by Dr Mullis30
7156265923Proteinsnaturally occurring macromolecules composed of amino acids31
7156266399An amino acid has bothan amine and a carboxylic acid functional group32
7156266986Amino acids are linked together in sequence by amide bondsKnown as peptide linkages33
7156267282An amino acidhas a amine (NH2) and a carboxyl (COOH) attached to a carbon atom with a side chain (r) attached to the alpha carbon34
7156275697Polypeptidesin proteins, amino acids are linked together with peptide linkages or a peptide bond35
7156276290In a dipeptidetwo amino acid units are joined together by an amide bond36
7156278632In a polypeptide100s of amino acids are linked together37
7156279115Human insulin is composed of48 amino acids38
7156281640Primary structure of proteinsequence of amino acids, the replacement of one amino acid can alter its biological activity39
7156285118Secondary structure of proteinswhen the peptide chain twists and bends, they acquire a secondary structure40
7156287543a-helix (secondary structure)analogous to that in a coiled telephone41
7156289014pleated sheet (b-sheets)the chains run antiparallel to each other like a folded piece of paper42
7156293188Secondary structures in proteinsresult of hydrogen bonds43
7156294076Tertiary structure of proteinoverall three-dimensional structure of a protein44
7156296609the tertiary structure may belong and extended or compact and folded45
7156304285Enzymeprotein that acts as a biological catalyst46
7156305392Enzymes are incredibly selectivefor specific molecules47
7156311242an enzyme canspeed up a biochemical reaction so that the rate is a million times faster than it would be in the absence of the enzyme48
7156319090Many reactionswould be too slow to with out the enzyme to sustain life49
7156319232Lock-and-key modeldescribes enzyme mechanisms50
7156319553The key is the enzymeThe lock is the substrate51
7156324968Active sitethe location where the reaction occurs on the enzyme52
7156325215substratemolecule that reacts53
7156326380The substrate binds to the active site on the enzymeThe enzyme releases two or more products54
7156326824Once the reaction has occurredthe active site is free to bind to another substrate molecule and repeat55
7156327238Ptyalin is in human saliva andcatalyzes the breaking down of starch molecules into sugar units56
7156328395Carbohydratesthe word carbohydrate means hydrates of carbon and many are CH2O57
7156330063Carbohydrates usually end inose58
7156330064Carbohydrates typically havean aldehyde or ketone functional group of several hydroxyl groups59
7156330570Carbohydrateeither a simple sugar or complex structures composed of many simple sugars60
7156331858DisaccharideTwo monosaccharide molecules joined together61
7156332419In the formation of a disaccharide, two simple sugars split and are joined together by a special -O- bondglycoside linkage62
7156333469In a aqueous solution,sugar molecules usually exist in ring structures63
7156333978Glucose forms acyclic structure by joining a hydroxyl group to an aldehyde group (5 carbon, 1 O)64
7156334474Polysaccharidepolymer of many monosaccharide linkages joined by glucose linkages65
71563357903 different types of lipidsFatty acids, Triglycerides, Steroids66
7156336284Fatty acidsLong-chain carboxylic acids, typically containing 12-18 carbon atoms, typically insoluble in water67
7156336842Waxesare found in many plants and animals, esters of long chain fatty acids and alcohols68
7156337359Steroid compoundshave steroid nucleus, have four carbon rings fused together, lipids but do not contain fatty acids69
7156338241Cholesterolmost important and abundant steroid compound in your body.70
7156338978Steroid: Cholesterolis a sterol because it contains a hydroxyl (-OH) group. has a methyl group, a double bond and a carbon side chain71
7156339742Cholesterol is obtained fromeating meats, milk, and eggs, its also synthesized in the liver from fats, carbs and proteins NOT found in vegetables or plants72
7156341578Protein structure consists ofPrimary structure, secondary structure, helix, beta sheet, tertiary structure73
7156342493Quaternary Structure:HemoglobinQuaternary structure of hemoglobin consists of four polypeptide subunits74
7156343906A proteincomposed of amino acids75
7156343907A carbohydratecomposed of simple sugar molecules76
7156344309A lipidwater-insoluble biological molecule77
7156344667A nucleic acidpolymer composed of a sugar molecule a nitrogen base and a phosphoric acid78

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