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Photo respiration (1)

photorespiration

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Photo respiration (1)

  1. 1. CELLS & EN ER GY PHOTOSYNTHESIS
  2. 2. Need energy to: •move •change shape •repair structure •make new cell parts •transport food •expel wastes
  3. 3. Sun is ultimate source of energy Autotrophs – make own food Heterotrophs – eat other orgs Energy is obtained through Biochemical Pathways = linked chemical reactions (product of one is reactant of another)
  4. 4. Photosynthesis- Light energy converted to chemical energy of organic compounds (carbs) Autotrophs only Cellular Respiration- Organic compounds broken down to create ATP Autotrophs & Heterotrophs
  5. 5. 6CO2 + 6H20 + solar energy C6H12O6 + 6O2 • Occurs in leaves where chloroplasts are abundant
  6. 6. •White light made of visible spectrum (different wavelengths)
  7. 7. • Plants contain pigments (compounds that absorb light) • Chlorophyll – reflects green light (green leaves); uses red & blue • Carotenoids – reflect yellow, orange, brown (fruits/flowers)
  8. 8. 3 STAGES 1. Energy captured from light 2. Energy used to make ATP & NADPH (high energy compound) 3. ATP & NADPH used to make carbs from O2
  9. 9. • Light • Concentration • Temperature
  10. 10. • Light • Concentration • Temperature

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