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Warm up:

Warm up: . In a plant cell, the synthesis of sugar compounds from inorganic raw materials occurs in the Cell membrane Mitochondria Nucleus C hloroplasts. Photosynthesis. photosynthesis. Process by which energy is stored in chemical bonds of organic molecules

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Warm up:

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  1. Warm up: • In a plant cell, the synthesis of sugar compounds from inorganic raw materials occurs in the • Cell membrane • Mitochondria • Nucleus • Chloroplasts

  2. Photosynthesis

  3. photosynthesis • Process by which energy is stored in chemical bonds of organic molecules • Metabolic pathway that converts carbon dioxide into organic compounds, especially sugars, using the energy from sunlight • Convert inorganic molecules (CO2 and H2O) into energy rich, organic compounds such as sugars

  4. Photosynthesis formula • Light energy + H2O + CO2C6H12O6 + O2

  5. Does that formula look familiar? • It is the opposite of aerobic cellular respiration • C6H12O6 + O2 H2O + CO2 + ATP

  6. Much of the carbon dioxide produced by green plants is not excreted as a metabolic waste because it (1) can be used for photosynthesis (2) is too large to pass through cell membranes (3) is needed for cellular respiration (4) can be used for the synthesis of proteins

  7. Where does the energy from photosynthesis come from? • The SUN • Photosynthesis occurs during the daytime when light is available

  8. Where in the cell does photosynthesis occur? • Chloroplasts

  9. What is chlorophyll? • Green pigment in chloroplasts responsible for absorbing light energy

  10. Are there other pigments in plants? • Yes, we know this from a method called chromatography which separates mixtures • PROCEDURE • Place a small drop of sample onto a piece of paper • Paper is placed in a small amount of solvent • As solvent travels up the paper by capillary action, pigments separate out based on polarity

  11. Why are plants green? • Chloroplasts reflect green light

  12. Plants use glucose for… • Food • Generate ATP during cellular respiration • Used as a raw material for building more complex molecules • Cell wall is made from cellulose which is a polymer made of repeating glucose molecules • Plants also store glucose as starch

  13. What organisms photosynthesize? • Plants • Protists (Euglena, Algae) • Bacteria • They are called autotrophs because they make their own food

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