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Photosynthesis

Photosynthesis. How do we grow a plant?. But is that all????. Plants need to do Photosynthesis. Chlorophyll inside. What you don’t see…. Photosynthesis- what goes in? . Sunlight (light Energy). Carbon Dioxide CO 2. Water H 2 O. Photosynthesis- what comes out?.

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Photosynthesis

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  1. Photosynthesis

  2. How do we grow a plant? But is that all????

  3. Plants need to do Photosynthesis Chlorophyll inside

  4. What you don’t see…

  5. Photosynthesis- what goes in? Sunlight (light Energy) Carbon Dioxide CO2 Water H2O

  6. Photosynthesis- what comes out? Sunlight (Light Energy) Glucose C6H12O6 Water H2O Oxygen O2 Carbon Dioxide CO2

  7. Photosynthesis • Let’s write the chemical equation on the board!! • What are the reactants, What are the products?

  8. Reaction • CO2 + H2O + light O2 + C6H12O6 • But it’s not balanced • 6 CO2 + 6 H2O + light 6 O2 + C6H12O6 Products Reactants What type of energy transformations are going on?

  9. Photosynthesis has an “opposite” reaction… • ALL cells must perform this reaction • (not like photosynthesis that only occurs in autotrophs) • Occurs in Mitochondria • It’s why we breathe • In fact the name we give to breathing is named after this cellular process • Any guesses???

  10. Cell Respiration Carbon Dioxide CO2 Glucose C6H12O6 Water H2O Oxygen O2 Energy

  11. Cell Respiration • Let’s draw the chemical formula on the board!! • What are the reactants, What are the products? • What type of energy transformations are going on?

  12. It’s a cycle in plant cells, Jennnnay

  13. The process of cellular respiration is taking place in your cells right now!! • You are currently taking in oxygen and burning sugars within the mitochondria to release chemical energy. • This process is also known as Aerobic Respiration. Why? • Because Oxygen is present which allows your cells to burn glucose into energy much more efficiently. • I am sure you have heard of Aerobics.

  14. What would happen if your cells were deprived of oxygen?? Would they still be able to burn glucose to make energy?? • YES!! • Fermentation • When might this occur? • Long distance runners often create an anaerobic environment for their cells • What does anaerobic mean?? • No Oxygen present • Not a very energy efficient process and a bad side effect is produced: • Lactic Acid

  15. A different example of fermentation • Breweries rely on this process: • Yeast cells need energy to survive, so they will breakdown sugars in anaerobic conditions and a byproduct is alcohol. • How do you know CO2 is produced?

  16. Fermentation • Anaerobic • Animals produce lactic acid and CO2 • Plants produce ethyl alcohol and CO2 • Less efficient…pgs 124-125 • Aerobic respiration yields at least 36 ATP • Anaeorobic nets a measly 2 ATP

  17. _____________________ _________________________________ _________________________________ _____________________ Let’s fill in this chart with the molecules and then the energy transformations

  18. Carotene Xanthophyll Chlorophyll A Chlorophyll B Why do leaves change colors??

  19. These chromatograms show chlorophyll b at the bottom, followed by chlorophyll a, xanthophylls, and carotenes.

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