Photosynthesis Chapter 8
Energy and Life <ul><li>Living organisms need energy to survive. </li></ul><ul><li>Where does the energy they need come fr...
Energy and Life <ul><li>Producers  are organisms that make their own food. </li></ul><ul><li>Examples:  Green plants and  ...
Energy and Life <ul><li>Photosynthesis  is the process by which cells use light energy to make organic compounds from inor...
Energy and Life <ul><li>Photosynthetic producers use <3% of the sun’s energy. </li></ul><ul><li>The energy harvested for p...
Energy and Life <ul><li>Consumers  are organisms that get their food from others. </li></ul><ul><li>Consumers = Heterotrop...
Energy and Life
Electromagnetic Spectrum <ul><li>Reading “Origin of Photosynthetic Organisms” </li></ul><ul><li>Gamma Rays= High E and Sho...
Lights and Pigments <ul><li>Plants absorb the sun’s energy with light absorbing molecules called  pigments . </li></ul><ul...
Typical Leaf Structure
Function of Stomata <ul><li>Transpiration  is the loss of water by plants to the atmosphere </li></ul><ul><li>Stomata open...
Chloroplast Structure
Photosynthesis: Overview <ul><li>Types of Organims? </li></ul><ul><li>Source of Energy? </li></ul><ul><li>Structure: Leaf ...
Photosynthesis Overview
Photosynthesis Overview
Terminology <ul><li>Types of Reactions: </li></ul><ul><li>-Light-Dependent </li></ul><ul><li>-Light-Independent/Calvin Cyc...
Light-Dependent Reactions
Light-Dependent Reactions
Chemiosmosis
Light-Dependent Reactions Summary <ul><li>Input:  2 Water Molecules </li></ul><ul><li>  Light Energy </li></ul><ul><li>Out...
Calvin Cycle
Light-Independent Reactions Summary <ul><li>Input: 1 Turn of Cycle </li></ul><ul><li>- 3 carbon dioxide molecules </li></u...
Rate of Photosynthesis and View of Other Pathways <ul><li>BSCS Text: pages 170-177 </li></ul>
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PD 2 Photosynthesis Notes

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PD 2 Photosynthesis Notes

  1. 1. Photosynthesis Chapter 8
  2. 2. Energy and Life <ul><li>Living organisms need energy to survive. </li></ul><ul><li>Where does the energy they need come from? </li></ul><ul><li>A: Photosynthesis or Chemosynthesis </li></ul><ul><li>These organisms are called producers. </li></ul>
  3. 3. Energy and Life <ul><li>Producers are organisms that make their own food. </li></ul><ul><li>Examples: Green plants and cyanobacteria (blue-green algae) </li></ul><ul><li>Producers are also called autotrophs. </li></ul>
  4. 4. Energy and Life <ul><li>Photosynthesis is the process by which cells use light energy to make organic compounds from inorganic materials. </li></ul><ul><li>What do you think chemosynthesis is? What organisms might use it? </li></ul>
  5. 5. Energy and Life <ul><li>Photosynthetic producers use <3% of the sun’s energy. </li></ul><ul><li>The energy harvested for photosynthesis is the energy needed for survival of all other organisms on our planet. </li></ul><ul><li>How do these other organisms obtain energy? </li></ul><ul><li>A: </li></ul>
  6. 6. Energy and Life <ul><li>Consumers are organisms that get their food from others. </li></ul><ul><li>Consumers = Heterotrophs </li></ul><ul><li>What is the ultimate source of energy for living things? </li></ul><ul><li>A: </li></ul>
  7. 7. Energy and Life
  8. 8. Electromagnetic Spectrum <ul><li>Reading “Origin of Photosynthetic Organisms” </li></ul><ul><li>Gamma Rays= High E and Short λ </li></ul><ul><li>Radio/radar/tv =Low E and Long λ </li></ul><ul><li>* λ = wavelength </li></ul><ul><li>Photon -smallest unit of light </li></ul>
  9. 9. Lights and Pigments <ul><li>Plants absorb the sun’s energy with light absorbing molecules called pigments . </li></ul><ul><li>There are several types of pigments: </li></ul><ul><ul><li>Chlorophyll a and b, carotenes, xanthophylls, carotenoids </li></ul></ul>
  10. 10. Typical Leaf Structure
  11. 11. Function of Stomata <ul><li>Transpiration is the loss of water by plants to the atmosphere </li></ul><ul><li>Stomata open = water and gas exchange </li></ul><ul><li>How do they open and close? </li></ul>
  12. 12. Chloroplast Structure
  13. 13. Photosynthesis: Overview <ul><li>Types of Organims? </li></ul><ul><li>Source of Energy? </li></ul><ul><li>Structure: Leaf and Chloroplasts </li></ul><ul><li>Electromagnetic Spectrum and Pigments </li></ul><ul><li>Photosynthetic Investigations: </li></ul><ul><li>-Jan van Helmont-Hydrate </li></ul><ul><li>-Joseph Priestly-Carbon </li></ul><ul><li>-Jan Ingenhousz-Light </li></ul>
  14. 14. Photosynthesis Overview
  15. 15. Photosynthesis Overview
  16. 16. Terminology <ul><li>Types of Reactions: </li></ul><ul><li>-Light-Dependent </li></ul><ul><li>-Light-Independent/Calvin Cycle/ Carbon-fixation Cycle/ C3 cycle </li></ul><ul><li>NADP + and NADPH </li></ul><ul><li>Electron Transport Chain (ETS) </li></ul>
  17. 17. Light-Dependent Reactions
  18. 18. Light-Dependent Reactions
  19. 19. Chemiosmosis
  20. 20. Light-Dependent Reactions Summary <ul><li>Input: 2 Water Molecules </li></ul><ul><li> Light Energy </li></ul><ul><li>Output: 2 NADPH </li></ul><ul><li>ATP </li></ul><ul><li>Oxygen Gas </li></ul><ul><li>Why is ATP and NADPH not enough? </li></ul>
  21. 21. Calvin Cycle
  22. 22. Light-Independent Reactions Summary <ul><li>Input: 1 Turn of Cycle </li></ul><ul><li>- 3 carbon dioxide molecules </li></ul><ul><li>- 9 ATP </li></ul><ul><li>- 6 NADPH </li></ul><ul><li>Output: 1 Turn of Cycle </li></ul><ul><li>- 1 3-carbon G3P (PGAL) Molecule </li></ul><ul><li>2 Turns of the cycle needed for carbohydrate synthesis. Reading Worksheet: “Fate of PGAL” </li></ul>
  23. 23. Rate of Photosynthesis and View of Other Pathways <ul><li>BSCS Text: pages 170-177 </li></ul>

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