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Photosynthesis

Photosynthesis. Photo + Synthesis. Photo = ? Synthesis = ?. From its name, what do you think mean?. http://s3.amazonaws.com/picable/2009/04/17/885193_Photosynthesis-How-it-Works-LightDependent-Reactions-amp-Calvin-Cycle_620.jpg. Guess the message of this slide.

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Photosynthesis

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  1. Photosynthesis

  2. Photo + Synthesis • Photo = ? • Synthesis = ? From its name, what do you think mean? http://s3.amazonaws.com/picable/2009/04/17/885193_Photosynthesis-How-it-Works-LightDependent-Reactions-amp-Calvin-Cycle_620.jpg

  3. Guess the message of this slide http://s3.amazonaws.com/picable/2009/04/17/885193_Photosynthesis-How-it-Works-LightDependent-Reactions-amp-Calvin-Cycle_620.jpg http://www.geographyalltheway.com/ib_geography/ib_ecosystems/imagesetc/food_web.gif

  4. Are plants the only organisms that can carry out photosynthesis? http://bio1151b.nicerweb.net/Locked/media/ch10/10_02Photoautotrophs.jpg

  5. Science Golden Rule • Law of Conservation of Energy • energy can neither be created nor destroyed, it can only be transformed from one state to another Q: Describe the energy transformation that takes place in photosynthesis.

  6. Cellular Respiration vs Photosynthesis Oxygen, Carbon dioxide, Glucose, Water, ATP, Light 1. Choose words from the above list to write the word equation for cellular respiration. 2. Choose words from the above list to write the word equation for photosynthesis. 3. What do you notice?

  7. Cellular Respiration vs Photosynthesis Cellular respiration Oxygen + Glucose  Carbon dioxide + Water + ATP Photosynthesis Carbon dioxide + Water + Light  Oxygen + Glucose (Chemical energy ) (Chemical energy in organic compound) (Chemical energy in organic compound) (Light energy)

  8. Cellular Respiration vs Photosynthesis Cellular respiration 6 O2 + C6H12O6  6 CO2 + 6 H2O + ATP Photosynthesis 6 CO2 + 6 H2O + Light  6 O2 + C6H12O6

  9. Light What colour would you describe this light? http://www.trekearth.com/gallery/Europe/Portugal/South/Lisboa/Massama/photo133016.htm

  10. A Spectrum of Colour http://www.insidesocal.com/friendlyfire/rainbow-too.jpg http://www.andybrain.com/sciencelab/wp-content/uploads/2007/12/cd-spinner-3.jpg

  11. All come from white light http://electron9.phys.utk.edu/phys135d/modules/m10/images/prism.jpg

  12. Light detectable by human eyes http://cronodon.com/sitebuilder/images/spectrum.jpg

  13. Lightwaves, wavelength http://www.wwu.edu/depts/skywise/img/light_spectrum.bmp

  14. How do we see colours? http://learn.uci.edu/media/OC08/11004/OC0811004_Red.jpg

  15. How do we see colours? Red apple reflects red light and absorbs other colours http://www.factmonster.com/images/ESCI122COLOUR008.jpg http://www.princetonol.com/groups/iad/lessons/middle/images/apple_reflection.jpg

  16. Light enters the eye, signals are sent to the brain, colours are interpreted

  17. Visible light is only the waves the human eyes can see Ultraviolet Infrared X-ray Microwave http://www.maplin.co.uk/images/Full/mw36p.jpg http://www.centurionservices.com/images/infrared.jpg http://www.sailorsams.com/images/contoure_microwave_cm7060S.jpg http://sleevage.com/wp-content/uploads/2007/08/homer_simpson_xray.jpg

  18. http://www.colourtherapyhealing.com/colour/images/electromagnetic-spectrum.jpghttp://www.colourtherapyhealing.com/colour/images/electromagnetic-spectrum.jpg

  19. What colour does a leaf reflect? What colours does it absorb? Red apple reflects red light and absorbs other colours http://www.faqs.org/photo-dict/photofiles/list/3394/4513chestnut_leaf.jpg http://www.factmonster.com/images/ESCI122COLOUR008.jpg http://www.princetonol.com/groups/iad/lessons/middle/images/apple_reflection.jpg

  20. 3.8.3, 3.8.4Absorption Spectrum Chlorophyll http://www.shortcourses.com/images/b4ch4/greenobject.jpg http://www.vernier.com/caliper/fall06/images/chlorophyll_large.jpg

  21. 3.8.3 Chlorophyll as pigment

  22. 8.2.7 Absorption Spectrum Light absorbed by plants Action Spectrum Light used for photosynthesis http://www.cartage.org.lb/en/themes/Sciences/BotanicalSciences/PlantHormones/Nutrition/706.GIF

  23. Details of Photosynthesis • Many similarities to cellular respiration! • Familiar terms: • H+ (protons), electrons, NADP+, NADPH, electron transport chain, ATP, ADP, phosphates, ATP synthase, proton gradient, chemiosmosis • (Go revise cellular respiration first! You’ll feel more confident.)

  24. Q: How does plant obtain water? http://www.caribbeanedu.com/images/kewl/photosynthesis.gif

  25. Identify in this diagram Assessment Statements 3.8.5 and 3.8.6 Inside the chloroplast http://www.biologycorner.com/resources/photosynthesis3.jpg

  26. Identify in this diagram Assessment Statements 3.8.5 and 3.8.6 Inside the chloroplast http://www.biologycorner.com/resources/photosynthesis3.jpg

  27. 8.2.1, 8.2.6 http://www.s-cool.co.uk/assets/learn_its/alevel/biology/cells-and-organelles/organelles/chloroplast-b.gif

  28. http://cfcc.edu/faculty/dnorris/pdf/photosynthesis.jpg

  29. 8.2.3 8.2.4

  30. 8.2.5 Light-independent Reaction/ Calvin Cycle • Carbon dioxide is "fixed" or attached to a 5-carbon sugar called ribulose biphosphate (RuBP) • by the enzyme ribulose biphosphate carboxylase (RuBisCo) • Produce a 6-carbon sugar similar to the sugar glucose. Each (unstable) 6 carbon molecules splits into 2 (3 Carbon compounds) known as Glycerate 3-phosphate (GP) which is an acid. • ATP and NADPH used to convert GP to sugar Triose Phosphate (TP, a.k.a. Glyceraldehyde 3-phosphate, G3P) • TP can be removed from the cycle and used for the formation of larger carbohydrates such as glucose, sucrose and starch. • 3 RuBP is regenerated from the every 5 remaining TP. (3 x 5C = 5 x 3C)

  31. (GP) = Triose Phosphate (TP)

  32. Factors affecting rate of photosynthesis

  33. 3.8.8, 8.2.8 Where have you seen a similar graph before? http://click4biology.info/c4b/3/images/3.8/temperature.gif

  34. 3.8.8, 8.2.8 Where have you seen a similar graph before? http://www.skoool.ie/skoool/uploadedImages/contentimages/graph2.gif http://www.spsbiology.info/Learning%20exercises/Photosynthesis%20mulitchoice/CO2%20limiting.gif

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