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AQA A-LEVEL BIOLOGY PAPER 1 EXAM WITH FULL PACK SOLUTIONS
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AQA A-LEVEL BIOLOGY PAPER 1 EXAM WITH FULL PACK SOLUTIONS
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AQA A-LEVEL BIOLOGY PAPER 1EXAM WITH FULL PACK SOLUTIONS
large bmolecules boften bcontain bcarbon. bwhy? b- b bcorrect banswer-they bcan breadily
bform bbonds bwith bother bcarbon batoms. bthis bforms ba b'backbone'. bother batoms bcan
bthen battach.
describe bbenedicts btest bfor breducing bsugars b- b bcorrect banswer-add bequal bvolumes
bof bthe bsugar bsample band bbenedicts breagent.
heat bthe bmixture bin ba bwater bbath bfor b5 bminutes.
brick bred bprecipitate bwill bform.
what bis ba breducing bsugar? b- b bcorrect banswer-a bsugar bthat bcan breduce b(give
belectrons bto) banother bchemical.
describe bthe bbenedicts btest bfor bnon breducing bsugars b- b bcorrect banswer-with bfood
bsample, badd ban bequal bvolume bof bdilute bhydrochloric bacid bin ba btest btube.
place btest btube bin bwater bbath bfor b5 bmins. b
add bsodium bhydrogencarbonate bsolution.
heat bresulting bsolution bwith ban bequal bvolume bof bbenedicts. bsolution bfor b5 bminutes.
turns borange/brown.
what bdoes bdilute bhydrochloric bacid bdo bin bthe bbenedicts btest bfor bnon breducing
bsugars? b- b bcorrect banswer-it bhydrolyses bany bdisaccharide binto bmonosaccharides,
bthus balso bforming breducing bsugars.
describe bthe bstructure bof bstarch b- b bcorrect banswer-chains bof balpha bglucose b
some bchains bare bbranched= bamylopetcin
some bchains bare bcoiled= bamylose
what bpurpose bdoes bthe bstructure bof bamylose bserve? b- b bcorrect banswer-makes bthe
bmolecule bcompact bso bit bis bstored bmore beasily.
what bpurpose bdoes bthe bstructure bof bamylopectin bserve? b- b bcorrect banswer-more
bsurface barea bfor benzymes bto bwork bon, bthus bglucose bmolecules bcan bbe breleased
bat ba bmuch bquicker brate.
, how bis bthe bstructure bof bstarch bsuited bto bits bfunction? b- b bcorrect banswer-1. bstarch bis
binsolube bso bit bdoesnt baffect bwater bpotential
2. bit bis blarge benough bthat bit bdoesnt bdiffuse bout bof bcells
3. bcompact benough bso bthat ba blot bof bit bcan bbe bstored bin ba bsmall bspace
4. bbranched= beach bend bcan bsimultaneously bbe bacted bon bby benzymes, bso bglucose
bis bquickly breleased
how bis bthe bstructure bof bglycogen bsuited bto bits bfunction? b- b bcorrect banswer-1.
binsoluble, bso bno beffect bon bwater bpotential bof bcell
2. binsoluble, bso bdoesnt bdiffuse bout bof bcells
3. bcompact, ba blot bof bit bcan bbe bstored bin ba bsmall bspace
4. bvery bhighly bbranched= beach bend bcan bsimultaneously bbe bacted bon bby benzymes,
bso bglucose bis bquickly breleased
why bdo banimals bneed bhighly bbranched bglycogen? b- b bcorrect banswer-because
banimals bmetabolic brate bis bfaster bthan bplants band bso bneeds bglucose bto bbe
breleased bquicker.
describe bthe bstructure bof bcellulose b- b bcorrect banswer-made bup bof bstraight bchains bof
bbeta bglucose
the bchains bare bparallel bto beach bother, bso bH bbonds bform bcross-linkages
all bthe bH bbonds btogether bstrengthens bthe bcellulose
forms bmicrofibrils
draw balpha band bbeta bglucose b- b bcorrect banswer-
how bdoes bthe bstructure bof btriglycerides brelate bto btheir bproperties? b- b bcorrect
banswer-1. btriglycerides bhave ba bhigh bratio bof benergy-storing bcarbon-hydrogen
bbonds bto bcarbon batoms, bso bits ba bgood bsource bof benergy.
2. blow bmass bto benergy bratio, bso btheyre bgood benergy bstorage bmolecules.
3. blarge band bnon-polar, btherefore binsoluble, btherefore bdon't baffect bosmosis.
4. bhigh bratio bof bhydrogen bto boxygen batoms, bso bcan brelease bwater bwhen boxidised,
bhence bprovide ba bsource bof bwater
what bare bthe broles bof blipids? b- b bcorrect banswer-1. bsource bof benergy
2. bwaterproofing
3. binsulation
4. bprotection
how bdoes bthe bstructure bof bphospholipids brelate bto btheir bproperties? b- b bcorrect
banswer-1. bpolar, btherefore bwill bposition bitself bto bform ba bbilayer
2. bthe bstructure ballows bthem bto bform bglycolipids bby bcombining bwith bcarbohydrates
bwithin bthe bcell-surface bmembrane. bthese bare bimportant bin bcell brecognition.
draw bthe bstructure bof ban bamino bacid b- b bcorrect banswer-
draw bhow ba bdipeptide bforms b- b bcorrect banswer-
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