Anaerobic respiration - GCSE Biology (Single Science) Revision

Unlike aerobic respiration, anaerobic respiration does not need oxygen. It is the release of a relatively small amount of energy in cells by the breakdown ... HomeNewsSportWeatheriPlayerSoundsBitesizeCBeebiesCBBCFoodHomeNewsSportReelWorklifeTravelFutureCultureTVWeatherSoundsClosemenu ChangelanguageEnglishCymraegGaeilgeGàidhligHomeLearnSupportCareersMyBitesizeAllBitesizeRevisevideoVideoquizTestprevious123Page2of3nextAnaerobicrespirationUnlikeaerobicrespiration,anaerobicrespirationdoesnotneedoxygen.Itisthereleaseofarelativelysmallamountofenergyincellsbythebreakdownoffoodsubstancesintheabsenceofoxygen.AnaerobicrespirationinmusclesAnaerobicrespirationhappensinmusclesduringhardexercise:glucose→lacticacidC6H12O6→2C3H6O3Glucoseisnotcompletelybrokendown,somuchlessenergyisreleasedthanduringaerobicrespiration.Thereisabuild-upoflacticacidinthemusclesduringvigorousexercise.Thelacticacidneedstobeoxidisedtocarbondioxideandwaterlater.Thiscausesanoxygendebt-knownasexcesspost-exerciseoxygenconsumption(EPOC)-thatneedstobe‘repaid’aftertheexercisestops.Thisiswhywekeeponbreathingdeeplyforafewminutesafterwehavefinishedexercising.AnaerobicrespirationinplantsandyeastAnaerobicrespirationalsohappensinplantcellsandsomemicroorganisms.Anaerobicrespirationinyeastisusedduringbrewingandbread-making:glucose→ethanol+carbondioxideC6H12O6→2C2H5OH+2C02Ethanolisthealcoholfoundinalcoholicdrinkslikebeerandwine.Inbread-making,bubblesofcarbondioxidegasexpandthedoughandhelpthebreadrise.AnaerobicrespirationbyyeasthelpsbreaddoughriseAerobicrespirationvsanaerobicrespirationThetablesummarisessomedifferencesbetweenthetwotypesofrespiration.AerobicAnaerobicOxygenNeededNotneededGlucosebreakdownCompleteIncompleteEndproduct(s)CarbondioxideandwaterAnimalcells:lacticacid.Plantcellsandyeast:carbondioxideandethanolEnergyreleasedRelativelylargeamountRelativelysmallamountAerobicrespirationreleases19timesmoreenergythananaerobicrespirationfromthesameamountofglucose.previous123Page2of3nextMoreGuidesAerobicandanaerobicrespirationGasexchangeinplantsnextRespiratorysystemnext2022examchangesAlltheadvanceinformationandrevisionsupportforthisyear’sexaminations.LearnmoreLinksPersonaliseyourBitesize!Signin,chooseyourGCSEsubjectsandseecontentthat'stailoredforyou.BBC:ScienceandEnvironmentBBCEarthBBCTomorrow'sWorldexternal-linkSaveMyExamsSUBSCRIPTIONexternal-linkQuizletexternal-linkTassomaiSUBSCRIPTIONexternal-linkHeadsqueezeexternal-linkRevisionBuddiesSUBSCRIPTIONGCSESubjectsGCSESubjectsupdownArtandDesignBiology(SingleScience)BusinessChemistry(SingleScience)CombinedScienceComputerScienceDesignandTechnologyDigitalTechnology(CCEA)DramaEnglishLanguageEnglishLiteratureFrenchGeographyGermanHistoryHomeEconomics:FoodandNutrition(CCEA)Hospitality(CCEA)ICTIrish–Learners(CCEA)Journalism(CCEA)LearningforLifeandWork(CCEA)MandarinMathsMathsNumeracy(WJEC)MediaStudiesModernForeignLanguagesMovingImageArts(CCEA)MusicPhysicalEducationPhysics(SingleScience)PSHEandCitizenshipReligiousStudiesScienceSociologySpanishWelshSecondLanguage(WJEC) ExploretheBBCHomeNewsSportWeatheriPlayerSoundsBitesizeCBeebiesCBBCFoodHomeNewsSportReelWorklifeTravelFutureCultureTVWeatherSounds