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Chapter 6 Photosynthesis

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damian
18 diapositives · 417 Views · Jul 28, 2014

Chapter 6 Photosynthesis. Where do organisms get energy?. Nearly all organisms depend on solar energy (sunlight) being converted into chemical energy. Sun: start of all energy Producers/Autotrophs: convert solar energy into simple sugars. . What are autotrophs and heterotrophs?.

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Chapter 6 Photosynthesis
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  1. Chapter 6 Photosynthesis

  2. Where do organisms get energy? • Nearly all organisms depend on solar energy (sunlight) being converted into chemical energy. • Sun: start of all energy • Producers/Autotrophs: convert solar energy into simple sugars.

  3. What are autotrophs and heterotrophs? • Autotrophs-organisms that can make their own food (producer) • Heterotrophs- organisms that can’t make their own food (consumer)

  4. What is Photosynthesis? • Photo=Light Synthesis=to make • The process which takes place in green plants where glucose and oxygen are made from sunlight

  5. What is the photosynthesis equation? H2O+CO2+sunlight ---> C6H12O6+O2 (Water) (carbon dioxide) (Glucose) (Oxygen)

  6. Where exactly does photosynthesis take place? • In the chloroplasts in the leaves

  7. Where exactly does photosynthesis take place? • Stroma: aqueous space in chloroplast • Thylakoid: site of the light-dependent reactions of photosynthesis • Grana: stack of thylakoids

  8. Where are the pigments found in chloroplasts? • Chlorophyll a- Directly involved in the light reaction • Accessory Pigments- chlorophyll b, carotenoids, xanthophyll • Absorb the wavelengths that are reflected from Chlorophyll a

  9. What happens in photosynthesis?

  10. What happens in the light reactions of photosynthesis? • Many steps where the light excites electrons which are then moved down an electron transport chain producing molecules of NADPH and ATP. • Also 02 is released

  11. What happens during the dark reactions or the Calvin Cycle? • Uses the energy stored in ATP and NADPH to attach carbon atoms in organic compounds such as glucose, amino acids, and lipids. • Glucose is combined to form carbohydrates • Amino acids are combined to form proteins

  12. What is the anatomy of a Leaf? • Cuticle-outer waxy layer of leaf; decrease water loss • Epidermis-upper and lower layer; protect leaf • Mesophyll-middle layer of leaf-chloroplasts; carry out photosynthesis • Vein-Tubes for transport of food and water; carry food and water through plant

  13. What is the anatomy of a Leaf? • Stoma-opening in the lower epidermis where gases pass through; allow gases to go in and out of the leaf • Guard Cells-Surround the stoma and regulate the opening and closing of the stoma; regulate opening and closing of stomata

  14. How do the reactants get into the plant? • CO2 enters the plant through the stoma in the leaves • H2O rises to the leaves through veins after being absorbed by roots • Sunlight diffuses through the cuticle and epidermis into mesophyll cells. Photosynthetic rate increases or decreases depending on the amount of reactants available.

  15. See the Process in Action! • http://highered.mcgraw-hill.com/sites/0072437316/student_view0/chapter10/animations.html