Process of Photosynthesis .pdf

Process of Photosynthesis

1. Waterabsorbedbythe
rootoftheplant.
Carbondioxideis
absorbed.Thesetwo
substancesgointothe
chloroplastwhichis
plantcell.
Finally,oxygenare
produced
Finally,glucoseareproduced
Thelightreactionsof
photosynthesisoccurinthe
thylakoidmembranesofthe
chloroplast.Thelight
reactionsproduceATPand
NADPH.Thecalvincycletakes
placeinthestromawhichis
intheinnerspaceof
chloroplasts.Thisproduces
glucoseandothercarbohydrate
molecules.
Location:stromainthechloroplast
TheCalvincycleispartofthedarkreactionofphotosynthesis.Thereactionsiteisthe
stromainthechloroplast.Thecyclecanbedividedintothreestages:carboxylation,reduction,and
regenerationofribonucleotidediphosphate.
Incarboxylationstages,CO2isusedforthecarboxylationofRuBP.This
reactioniscatalysedbytheenzymeRuBisCOanditresultsintheformation
oftwomoleculesof3-PGA(3-Phosphoglycericacid).
Inthenextstageisreduction.Inthisstage,ATPandNADPHisusedtohelpthe3-
PGAmolecules,whicharecreatedthroughcarbonfixation,toconvertintomoleculesofa
simplesugar­glyceraldehyde-3phosphate(G3P).
Thefinalstateisregenerationofribonucleotidediphosphate,apartof
glyceraldehyde-3phosphatemoleculesareusedtomakeglucose,whereastheothers
arerecycledtoregeneratethefive-carbonRuBPcompoundthatisusedto
acceptnewcarbonmolecules.Besides,ATPchangestoADP.Sothat
thecyclehasenergytohappenagain.
Location:thechloroplast'sthylakoid
membrane(photosyntheticmembrane)
Thisisareactionoccursinthe
presenceoflightandisinducedby
light.Thelightreactionbegins
withtheabsorptionoflight
energyexcitationbythe
photosyntheticpigmentsin
photosystemII(PSII)and
photosystemI(PSI).Then,
lightenergyisusedtosplit
watertoformoxygen,hydrogen
andelectronarereleased.Besides,
waterisusedasareducingagentthat
providesH+ionstoconvertNADPtoNADPH.Finally,H+
ionsareusedduringATPsynthasetoproduceATP.
NathanaelFreyaWill
EquationofPhotosynthesis
Photosynthesisistheprocessfromplantstoproduceoxygen
andsugarbyusingsunlight,waterandcarbon
dioxide.Photosynthesistakesplaceinthechloroplastsin
plants.Chloroplastscontainthechlorophyll.
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