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PHOTOSYNTHESIS. Refer to Text book chapter 8 for reference. PHOTOSYNTHESIS IN NATURE. Synthesizes energy-rich organic molecules from CO2 and H2OUses CO2 as a carbon source and light energy as energy sourceDirectly or indirectly supplies energy to most living organisms. Plants and other autotroph
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1. Photosynthesis (PS), Paper Chromatography, & Spectrophotometer Objectives:
Understand the chemical reaction for PS
Determine & measure the rate of PS
Explain the effect of light intensity on PS
Understand/Define/Recognize “pigments”, “absorption”, & “transmission”
Know the principle of paper chromatography
Understand the relationship between absorption & wavelength
2. PHOTOSYNTHESIS Refer to Text book chapter 8 for reference
3. PHOTOSYNTHESIS IN NATURE
Synthesizes energy-rich organic molecules from CO2 and H2O
Uses CO2 as a carbon source and light energy as energy source
Directly or indirectly supplies energy to most living organisms
4. Plants and other autotrophs are the producers of the biosphere Autotrophic nutrition (producers)
a. Photoautotrophs (plants, algae, some prokaryotes)
b. Chemoautotrophs (oxidation of inorganic substances, bacteria use sulfur or ammonia)
Heterotrophic nutrition (consumers or decomposers)
5. CHLOROPLASTS: SITE OF PHOTOSYNTHESIS Chlorophyll: green pigment, absorbs light
In mesophyll (interior tissue of leaf)
CO2 enters, O2 exits (stomata)
Water from roots through vascular bundles
Chloroplast: lens-shaped
Internal compartments:
Intermembrane space
Thylakoid space (thylakoids, grana)
Stroma