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AQA A - LEVEL BIOLOGY 2023 PAPER 2 WITH ANSWERS

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AQA A - LEVEL BIOLOGY 2023 PAPER 2 WITH ANSWERS Limitingzfactorszforzphotosynthesisz-zCORRECTzANSWER-lightzintensity,zcarbonzdioxidezconcentrationzandztemperature Describezchloroplastsz-zCORRECTzANSWER--granazarezstackedzintoz100szdisczcalledzthylakoids:zlightzdependent -stroma:zlightzindependent Givez4zadaptationszofzchloroplastsz-zCORRECTzANSWER-1-zfluidzofzstromazhaszallzenzymesztozcarryzoutzlightzindependent 2-zstromalzfluidziszmembranezboundzinzchloroplasts 3-zthezfluidzsurroundzthezgranazsozproductszofzlightzdependentzcanzreadilyzdiffusezintozstroma 4-zcontainszbothzDNAzandzribosomeszforzproteinsztozbezmanufacturedzquicklyzinzlightzindependent Stimulusz-zCORRECTzANSWER-azdetectablezchangezinzthezenvironmentzofzanzorganismzthatzleadsztozazresponse receptorsz-zCORRECTzANSWER-specificztozoneztypezofzstimuluszandzdetectzazstimulus Effectorsz-zCORRECTzANSWER-musclezorzglandszthezproducezazresponse Reflexzarcz-zCORRECTzANSWER-stimulus receptors sensoryzneurone CNSz(centralznervouszsystem) Motorzneurone Effectors Taxisz-zCORRECTzANSWER-Azresponsezwhosezdirectionziszdeterminedzbyzthezdirectionzofzthezstimulus Kinesisz-zCORRECTzANSWER-wherezanzorganismzchangeszthezspeedzandzratezatzwhichzitzchangeszdirection Tropismz-zCORRECTzANSWER-Azgrowthzresponsezofzazplantzinzresponseztozazdirectionalzstimulus Describezrodzcellsz-zCORRECTzANSWER--zManyzconnectztoz1zsinglezsensoryzneuronezwhichzcauseszazgreaterzpotentialzbyzrhodopsinztozbezbrokenzdownz -zDetectzveryzlowzlightzintensityz -Lowzvisualzacuityzaszmanyzcellszconnectztozazsinglezbipolarzcell Describezconezcellsz-zCORRECTzANSWER--Lesszsensitiveztozlight,zbutzfasterzresponse -Responsiblezforzdayzlightzfinezvisionzandzcolourzvisionz(PhotopiczVision) -approx.6zmillionzcones -Iodopsinzrequireszazhigherzlightzintensityzforzitztozbreakzdownzandzaszazresulyzeachziszsensitiveztozdifferentzwavelengthszinzcells. -zGoodzvisualzacuity Temporalzsummationz-zCORRECTzANSWER-wherez1zpresynapticzneuronezreleaseszlotszofzneurotransmitterzrepeatedlyztozreachzthezthresholdzvaluezandztriggerzanzactionzpotential spatialzsummationz-zCORRECTzANSWER-severalzpresynapticzneuroneszreleasezneurotra

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AQA BIO

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AQA BIO

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AQA A - LEVEL BIOLOGY 2023 PAPER 2 WITH
ANSWERS
Limitingzfactorszforzphotosynthesisz-zCORRECTzANSWER-
lightzintensity,zcarbonzdioxidezconcentrationzandztemperature

Describezchloroplastsz-zCORRECTzANSWER--
granazarezstackedzintoz100szdisczcalledzthylakoids:zlightzdependent

-stroma:zlightzindependent

Givez4zadaptationszofzchloroplastsz-zCORRECTzANSWER-1-
zfluidzofzstromazhaszallzenzymesztozcarryzoutzlightzindependent

2-zstromalzfluidziszmembranezboundzinzchloroplasts

3-zthezfluidzsurroundzthezgranazsozproductszofzlightzdependentzcanzreadilyzdiffusezintozstroma

4-zcontainszbothzDNAzandzribosomeszforzproteinsztozbezmanufacturedzquicklyzinzlightzindependent

Stimulusz-zCORRECTzANSWER-
azdetectablezchangezinzthezenvironmentzofzanzorganismzthatzleadsztozazresponse

receptorsz-zCORRECTzANSWER-specificztozoneztypezofzstimuluszandzdetectzazstimulus

Effectorsz-zCORRECTzANSWER-musclezorzglandszthezproducezazresponse

Reflexzarcz-zCORRECTzANSWER-stimulus

receptors

sensoryzneurone

CNSz(centralznervouszsystem)

Motorzneurone

Effectors

, Taxisz-zCORRECTzANSWER-Azresponsezwhosezdirectionziszdeterminedzbyzthezdirectionzofzthezstimulus

Kinesisz-zCORRECTzANSWER-wherezanzorganismzchangeszthezspeedzandzratezatzwhichzitzchangeszdirection

Tropismz-zCORRECTzANSWER-Azgrowthzresponsezofzazplantzinzresponseztozazdirectionalzstimulus

Describezrodzcellsz-zCORRECTzANSWER--
zManyzconnectztoz1zsinglezsensoryzneuronezwhichzcauseszazgreaterzpotentialzbyzrhodopsinztozbezbrokenzd

ownz

-zDetectzveryzlowzlightzintensityz

-Lowzvisualzacuityzaszmanyzcellszconnectztozazsinglezbipolarzcell

Describezconezcellsz-zCORRECTzANSWER--Lesszsensitiveztozlight,zbutzfasterzresponse

-Responsiblezforzdayzlightzfinezvisionzandzcolourzvisionz(PhotopiczVision)

-approx.6zmillionzcones

-
Iodopsinzrequireszazhigherzlightzintensityzforzitztozbreakzdownzandzaszazresulyzeachziszsensitiveztozdifferentz
wavelengthszinzcells.

-zGoodzvisualzacuity

Temporalzsummationz-zCORRECTzANSWER-
wherez1zpresynapticzneuronezreleaseszlotszofzneurotransmitterzrepeatedlyztozreachzthezthresholdzvalueza
ndztriggerzanzactionzpotential

spatialzsummationz-zCORRECTzANSWER-
severalzpresynapticzneuroneszreleasezneurotransmittersztozreachzthezthresholdzvaluezofzthezpostynapticzn
euronezandztriggerzanzactionzpotential

RefractoryzPeriodz-zCORRECTzANSWER-
theztimezfollowingzanzactionzpotentialzduringzwhichzaznewzactionzpotentialzcannotzbezinitiated

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Institution: AQA BIO
Course: AQA BIO

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Uploaded on: October 2, 2024
Number of pages: 12
Written in: 2024/2025
Type: Exam (elaborations)
Contains: Questions & answers

Subjects

effectors
receptorsz
structurezofzactinz
aqa a level biology 2023 paper 2 with answers
limitingzfactorszforzphotosynthesisz zcorrectzansw
factorszofzmyelinzsheathz zcorrectzanswer 1 zincre

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AQA A - LEVEL BIOLOGY 2023 PAPER 2 WITH ANSWERS

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