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Chemical equation of Photosynthesis
6CO2 + 6H2O ---light---> C6H12O6 + 6O2
little pores on underside of leaf to help CO2 to enter the plant stoma (plural version= stomata)
fleshy part of leaf
discs in chloroplasts filled with chlorophyll
fluid filling in chloroplast
Order these from biggest to smallest:
B) mesophyll tissue
Mesophyll tissue ---> cell ---> chloroplast ---> thylakoid ---> chlorophyll
2 processes that make up Photosynthesis
- -Light reaction: use light energy to split water; make NADPH and ATP
- -Calvin Cycle: incorporate light reaction products; change CO2 to G3P to make glucose
electron carrier and coenzyme; NADP+ + H+ ---> NADPH
enzyme that makes ATP
3 carbon sugar used to make glucose (1/2 of glucose)
LEO says GER
- Loses Electrons = Oxidation
- Gain Electrons = Reduction
- (both happen at same time)
Where does the light reaction occur?
in the thylakoid membrane
Light reaction process
- 1) capture light energy with chlorophyll which excites an electron (released)
- 2) water splits to replace lost electron
- 3) excited electron passed down Electron Transport Chain (ETC)
- 4) create H+ gradient (active transport)
- 5) NADP+ accepts electrons to become NADPH
- 6) produce ATP (couple with H+ gradient with enzyme ATP synthase)
Where does the Calvin cycle occur?
in the stroma
Calvin cycle process
- 1) incorporate/fix CO2
- 2) use up NADPH and ATP (donating electrons and energy)
- 3) make G3P (3 carbon sugar = 1/2 of glucose)
What is the importance of NADPH and ATP?
they connect the light reaction with the Calvin cycle
What happens to the plant?
a wasteful process occurring in hot, dry climates that produces no ATP or sugars
Stomata must close to avoid wilting; CO2 decreases and O2 increases
different arrangement of cells and different carbon molecules in Calvin cycle
examples: corn, sugarcane
different schedule, only open stomata at nighttime
examples: cactus, jade plants, pineapple
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