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What are the process occurs in photosynthesis? How starch is synthesize?
THYLAKOID Chloroplast Dark reaction occurs Light reaction  occurs STROMA
<ul><li>Light Reaction </li></ul><ul><li>Light energy  Chemical energy </li></ul><ul><li>Chlorophyll & accessory pigments ...
Non-cyclic photophosphorylation
Cyclic Photophosphorylation
Photosynthesis: Pathway of Carbon Fixation STARCH
 
CO2 combines with the phosphorylated  5-carbon sugar ribulose bisphosphate (RUBP) reaction is catalyzed by the enzyme  rib...
Phosphoglyceraldehyde  (PGAL)  serves as the  starting material  for  the  synthesis  of  glucose  and  fructose .  Glucos...
CO2 + H20 3-phosphoglycerate ATP + NADPH ADP + Pi NADP+ Triose Phosphate Sucrose, Starch ATP ADP CARBOXYLATION REDUCTION R...
Equation of sugar glucose  <ul><li>6CO2 + 12H2O    C6H12O6 + 6H2O + 6O2   </li></ul>
CH2O~P Chlorophyll H20 O2 CH2O~P H20 CO2 + H2O ( CH2O)n ATP [ADP + Pi], NADP+ +  NADPH Light
Reduction Process in Calvin cycle
<ul><li>Adds a phosphate from ATP to the 3-PGA  </li></ul><ul><li>removes hydrogen from NADPH and adds it to the 1,3-bisph...
Why convert Glucose to Starch?
<ul><li>products of photosynthesis are assembled in plant to make glucose  </li></ul><ul><li>Glucose (C 6 H 12 O 6 ) is a ...
<ul><li>When the plant needs energy, the bonds holding the glucose molecules together are broken, and energy is released  ...
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20100906140910 presentation1 photosynthesis

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Transcript of "20100906140910 presentation1 photosynthesis"

  1. 2. What are the process occurs in photosynthesis? How starch is synthesize?
  2. 3. THYLAKOID Chloroplast Dark reaction occurs Light reaction occurs STROMA
  3. 4. <ul><li>Light Reaction </li></ul><ul><li>Light energy Chemical energy </li></ul><ul><li>Chlorophyll & accessory pigments absorb slightly different color of light and pass its energy to central chlorophyll molecule (Chlorophyll a) to do photosynthesis. </li></ul><ul><li>Two forms of chlorophyll a molecules </li></ul><ul><li>P700 in PSI (700 nm) </li></ul><ul><li>P680 in PSII(680 nm) </li></ul><ul><li>Role of Photosystem </li></ul><ul><li>:Provide sufficient energy to boost the photoactivated electron to an energy level high enough accepted by NADP </li></ul><ul><li>: pump proton across thylakoid membranes. </li></ul>
  4. 5. Non-cyclic photophosphorylation
  5. 6. Cyclic Photophosphorylation
  6. 7. Photosynthesis: Pathway of Carbon Fixation STARCH
  7. 9. CO2 combines with the phosphorylated 5-carbon sugar ribulose bisphosphate (RUBP) reaction is catalyzed by the enzyme ribulose bisphosphate carboxylase oxygenase ( RUBISCO ) resulting 6-carbon compound breaks down into two molecules of 3-phosphoglyceric acid ( PGA ). PGA molecules are further phosphorylated (by ATP ) and are reduced (by NADPH ) to form phosphoglyceraldehyde ( PGAL ). Enzyme responsible for fixing 200 bilion tons of CO2 anually
  8. 10. Phosphoglyceraldehyde (PGAL) serves as the starting material for the synthesis of glucose and fructose . Glucose and fructose PolysaccharideSynthesis starch & cellulose Travel to other part of the plant As Monomer Sucrose
  9. 11. CO2 + H20 3-phosphoglycerate ATP + NADPH ADP + Pi NADP+ Triose Phosphate Sucrose, Starch ATP ADP CARBOXYLATION REDUCTION REGENERATION
  10. 12. Equation of sugar glucose <ul><li>6CO2 + 12H2O  C6H12O6 + 6H2O + 6O2 </li></ul>
  11. 13. CH2O~P Chlorophyll H20 O2 CH2O~P H20 CO2 + H2O ( CH2O)n ATP [ADP + Pi], NADP+ + NADPH Light
  12. 14. Reduction Process in Calvin cycle
  13. 15. <ul><li>Adds a phosphate from ATP to the 3-PGA </li></ul><ul><li>removes hydrogen from NADPH and adds it to the 1,3-bisphosphoglycerate </li></ul><ul><li>In this reduction, a phosphate is removed </li></ul><ul><li>resulting NADP+, ADP, and Pi can be recycled to the light reactions </li></ul><ul><li>These steps demonstrate why the light reactions and Calvin cycle are interdependent </li></ul>
  14. 16. Why convert Glucose to Starch?
  15. 17. <ul><li>products of photosynthesis are assembled in plant to make glucose </li></ul><ul><li>Glucose (C 6 H 12 O 6 ) is a monosaccharide or single sugar </li></ul><ul><li>plant uses glucose as short-term energy storage </li></ul><ul><li>converted into a polysaccharide called starch, allowing the plant to store most of the energy collected in photosynthesis in the chemical bonds between the sugars </li></ul>
  16. 18. <ul><li>When the plant needs energy, the bonds holding the glucose molecules together are broken, and energy is released </li></ul><ul><li>Starch is a better way to store energy because it has more bonds to hold potential energy and it can be stored in large amounts without disturbing the rest of the plant. </li></ul>
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