生物英语证书考试(pec)-生物技术常用词汇

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1、生物英语证书考试(PEC)-生物技术常用词汇A2DPAGETwo-dimensionalpolyacrylamidegelelectrophoresis.Themostcommontechniqueforproteinseparation.Proteinsareseparatedinonedimensionaccordingtotheirsize,andintheseconddimension,accordingtotheircharge(thatis,theirisolectricpoint).Afterseparation,thegelisstainedsothat

2、proteinspotscanbeseen.22qdeletionsyndromeAsyndromeassociatedwithasmalldeletion(missingsectionofDNA)onchromosome22.ActAlawmadebyParliamentoraprovinciallegislature.TheprocessofmakinganActofParliamentbeginswiththeintroductionofaproposedAct,orbill,inoneofthetwohousesofParliament(theSenateort

3、heHouseofCommons).AbillbecomesanActifitispassed(approved)bybothhousesandreceivesroyalassent.AlleleAformofagene.Weinheritonealleleofagenefromourmotherandtheotherallelefromourfather.Thesetwoallelescanbethesame(homozygous)ortheycanbedifferent(heterozygous).Allele-specificoligonucleotidehybr

4、idizationTheuseofanoligonucleotideprobetodeterminewhichofthetwoalternativenucleotidesequencesiscontainedinaDNAmolecule.AminoacidThebuildingblockofproteins.ThemessengerRNAtellsthecellwhataminoacidsareneededandwhatordertheymustbearrangedintobuildaparticularprotein.Thereare20differentaminoa

5、cidsusedinthehumanbody.AmniocentesisAprocedureusedinprenataldiagnosistolookatthechromosomesofthedevelopingfetus.Aflexibleneedleisinsertedintothemother'suterusthroughtheabdomentoremoveasampleofthefluidsurroundingthefetus(amnioticfluid).Thissamplecanthenbeanalysedbykaryotypetolookforchange

6、sinthechromosomes.Theprocedurecanbedoneafter15weeksofpregnancy.Thereisa0.5%riskofmiscarriageassociatedwiththisprocedure,whichmeansonein200womenwillmiscarryfollowingthisprocedure.AneuploidAcellwherethetotalnumberofchromosomesisnotanexactmultipleof23.Thehaploidnumberofchromosomesis23,which

7、isfoundintheeggandspermcells.Thediploidnumberis46,whichresultsfromthejoiningoftheeggandsperm.Thetriploidstateof69chromosomesrarelyoccursandisnotcompatiblewithlife.Themostcommonaneuploidnumbersare45(onechromosomeismissing)and47(onechromosomeisadded).AntibioticAnaturalorsyn