AQA A Level Biology - Energy and Ecosystems |EXAM
QUESTIONS AND 100% CORRECT
ANSWERS|2025/2026
WhereBdoBorganicBcompoundsBcomeBfromBinBanBecosystem?B-BANSWER- PlantsBsynthesiseBorganicBcompoundsBinBphotosynthesisBusingBatmosphericBorBaquaticBCO2
WhatBareBmostBofBtheBsugarsBproducedBinBphotosynthesisBusedBforB?B-BANSWER- RespirationB(asBrespiratoryBsubstrates)
WhatBareBtheBtwoBusesBofBorganicBcompoundsBproducedBinBphotosynthesisB?B-BANSWER- RespiratoryBSubstrates BuildingBotherBbiologicalBmoleculesBe.g.Bcellulose
WhatBisBbiomassB?B-BANSWER-TheBmassBofBlivingBmaterialBorBtheBchemicalBenergyBstored (i.e.BtheBbiologicalBmoleculesBproducedBbyBphotosynthesisBthatBaren'tBrespired)
WhatBareBtheBtwoBwaysBinBwhichBbiomassBcanBbeBmeasured?B-BANSWER- MassBofBcarbonBinBaBgivenBarea,BperBunitBtimeB DryBmassBofBtissueBinBaBgivenBarea,BperBunitBtime
HowBcanBtheBchemicalBenergyBstoreBinBdryBbiomassBbeBmeasuredB?B-BANSWER-CalorimetryB: BurnBsampleBofBdryBmassB (energyBreleasedBheatsBwater)B ChangeBinBtemperatureBofBwaterBusedBtoBdetermineBchemicalBenergy
HowBcanBtheBdryBmassB(biomass)BofBaBtissueBbeBfoundB?B-BANSWER- DryBaBsampleBinBanBovenBatBaBlowBtemperatureB WeighBatBregularBintervalsBuntilBconstantBmass
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