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The Plant Kingdom (Part III)

The Plant Kingdom (Part III). Kings of Photosynthesis. Engage. Explore. Begin Photosynthesis Lab Photosynthesis Foldable. Explain. Autotrophs: biotic producers; photoautotrophs; chemoautotrophs; obtains organic food without eating other organisms

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The Plant Kingdom (Part III)

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  1. The Plant Kingdom (Part III) Kings of Photosynthesis

  2. Engage

  3. Explore • Begin Photosynthesis Lab • Photosynthesis Foldable

  4. Explain • Autotrophs: biotic producers; photoautotrophs; chemoautotrophs; obtains organic food without eating other organisms • Heterotrophs: biotic consumers; obtains organic food by eating other organisms or their by-products (includes decomposers)

  5. Video 2

  6. General Over View of Photosynthesis Sunlight 1. 6 CO2+ 6 H2O ------------------> C6H12O6 +6 O2 Chlorophyll 2. Carried out in plants, algae, and some bacteria. 3. In plants and algae; chloroplasts. Bacteria; cytoplasm. 4. The process is broken down into two parts: a). Light reactions b). Dark reactions (Calvin Cycle).

  7. Light Spectrum

  8. Light Being Used • Chlorophyll is the main pigment in the chloroplast. It is green and will reflect the green light. • Plants use the violet- blue area of the spectrum the most. • The orange - red area is used also used.

  9. Chlorophyll Light Absorption Absorption of Light by Chlorophyll a and Chlorophyll b Chlorophyll b Chlorophyll a V B G Y O R

  10. The chloroplast • Sites of photosynthesis • Pigment: chlorophyll • Plant cell: mesophyll • Gas exchange: stomata • Double membrane • Thylakoids, grana, stroma

  11. Light CO2 Sugars O2 Photosynthesis: An Overview Chloroplast Chloroplast NADP+ ADP + P Light- Dependent Reactions Calvin Cycle ATP NADPH

  12. Video 3

  13. Light Reactions • This set of reactions needs sunlight and chlorophyll. • They occur in the area of the chloroplast called the thylakoids. • Sunlight hits and activates an area called the photosystem causing water molecules to split into H+ and O2 • The Oxygen leaves the cell, while the H+ are used to help create 2 high energy chemicals ATP and NADPH. • These chemicals are sent to the stroma to be used in the Dark Reactions.

  14. Dark Reactions • They occur in the stroma of the chloroplast. • This process does not need sunlight and can occur 24 hours a day. • In this series of reactions the plant makes a chemical called PGAL from carbon dioxide and the energy from the ATP and NADPH. • This PGAL is an intermediate compound that is raw material for all the materials a plant needs. The most common is sugar.

  15. Calvin Cycle CO2 Enters the Cycle Energy Input ChloropIast 5-Carbon Molecules Regenerated 6-Carbon Sugar Produced Sugars and other compounds

  16. Summary • This is a building process • It requires water, carbon dioxide, sunlight, and chlorophyll. It produces sugar and oxygen.. • The Light reaction produces oxygen and the needed materials for the Dark reactions. • The Dark reactions produce PGAL from the carbon dioxide, ATP and NADPH. • PGAL will be used to produce sugar and other materials.

  17. Elaborate • Finish Photosynthesis Lab • Photosynthesis Concept Map • Compare/Contrast Photosynthesis and Cellular Respiration

  18. Light- dependent reactions Calvin cycle Energy from sunlight Thylakoid membranes ATP Stroma NADPH High-energy sugars ATP NADPH O2 Chloroplasts CO2 Photosynthesis includes uses takes place in uses use take place in to produce to produce of

  19. Mitochondrion Electrons carried in NADH Electrons carried in NADH and FADH2 Pyruvic acid Glucose Electron Transport Chain Krebs Cycle Glycolysis Mitochondrion Cytoplasm

  20. Evaluation

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