photosynthesis by / ahmed fathy i love your eyes my princess
TRANSCRIPT
Photosynthesis
by / ahmed fathy I love your eyes my princess
6CO2 + 12 H2O C6H12O6 + 6O2
Simple molecule complex molecule
Physical energy chemical energy
C C6
Chlorophyll
light
meatabolism
•Anabolism : simple compound is converted to complex compound
•Catabolism : complex compound is converted to simple compound
Photosynthesis
Light reactin : take place in grana because they depend on electron transfer
Dark reaction : take place in stroma because they need to solution
Photosynthesis take place in chloroplast
What do plants need to grow?•The “factory” for making
energy & sugars–chloroplast
•Fuels–sunlight–carbon dioxide–water
•The Helpers–enzymes
•Chloroplasts–double membrane–stroma
•fluid-filled interior
–thylakoid sacs–grana stacks
•Thylakoid membrane contains
–chlorophyll molecules–electron transport chain–ATP synthase
Plant structure
H2O
ENERGYbuilding reactions
SUGARbuilding reactions
ATPADP
CO2
sugar
sun
used immediatelyto synthesize sugars
How do plants make energy & food?
•Plants use the energy from the sun–to make ATP energy–to make sugars
•glucose, sucrose, cellulose, starch, & more
sun
ATPsugars
Light reaction
Light reaction
ETC of Photosynthesis
•ETC uses light energy to produce–ATP & NADPH
•go to Calvin cycle
•PS II absorbs light–excited electron passes from chlorophyll to
“primary electron acceptor”–need to replace electron in chlorophyll–enzyme extracts electrons from H2O & supplies
them to chlorophyll•splits H2O•O combines with another O to form O2
•O2 released to atmosphere•and we breathe easier!
ETC of Photosynthesis
•ETC uses light energy to produce–ATP & NADPH
•go to Calvin cycle
•PS I absorbs light–excited electron passes from chlorophyll to
“primary electron acceptor”–need to replace electron in chlorophyll–Electron comes from ETC of PSII
–Excited electron passes to electron carrier molecule
•NADPH•Sent to Calvin Cycle in the stroma
split H2O
Light Reactions of Photosynthesis
O
ATP
to Calvin CycleH+
H+
H+
H+
H+
H+
H+
H+
H+H+
H+
e e
e e
sunsun
Dark reaction
From Light reactions to Calvin cycle
•Calvin cycle –chloroplast stroma
•Need products of light reactions to drive synthesis reactions
–ATP–NADPH
stroma
thylakoid
Photosynthesis summary
•Light reactions–produced ATP–produced NADPH–consumed H2O–produced O2 as byproduct
•Calvin cycle–consumed CO2
–produced G3P (sugar)–regenerated ADP–regenerated NADP
Light Reactions
O2
H2O
Energy BuildingReactions
ATP
produces ATP produces NADPH releases O2 as a
waste product
sunlight
H2O ATP O2light
energy ++ + NADPH
NADPH
Calvin Cycle
sugars
CO2
SugarBuilding
Reactions
ADP
builds sugars uses ATP &
NADPH recycles ADP
& NADP back to make
more ATP & NADPHATP
NADPH
NADP
CO2 C6H12O6 ++ + NADPATP + NADPH ADP
H2O
Energy cycle
Photosynthesis
Cellular Respiration
sun
glucose O2CO2
plants
animals, plants
ATP
CO2 H2O C6H12O6 O2light
energy + ++
CO2 H2OC6H12O6 O2ATP
energy+ ++
PHOTOSYNTHESIS
•What affects photosynthesis?–Light intensity: as light increases, rate of
photosynthesis increases
PHOTOSYNTHESIS
•What affects photosynthesis?–Carbon Dioxide: As CO2 increases, rate of
photosynthesis increases
PHOTOSYNTHESIS•What affects photosynthesis?
–Temperature :•Temperature Low = Rate of photosynthesis low•Temperature Increases = Rate of photosynthesis
increases•If temperature too hot, rate drops
with my best wishes
Ahmed mohammed fathy