1 / 11

Photosynthesis

Photosynthesis. Chapter 6 pg. 116-124. The Light Reactions. Steps: Light absorption  Electron Transport Chain  Chemiosmosis. Light Reaction . Location: Thylakoid Membrane Reactants: Light and H2O Product: O2 (waste product) and ATP. Calvin Cycle. Location: Stroma

rosalyn-sweet
Download Presentation

Photosynthesis

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Photosynthesis Chapter 6 pg. 116-124

  2. The Light Reactions • Steps: • Light absorption  Electron Transport Chain  Chemiosmosis

  3. Light Reaction • Location: Thylakoid Membrane • Reactants: Light and H2O • Product: O2 (waste product) and ATP

  4. Calvin Cycle • Location: Stroma • Reactants: CO2 and ATP • Product: C6H12O6 (sugar)

  5. Light and Pigments • Light • Visible light includes the colors of the rainbow • Pigments • Compounds that absorb specific colors of light. Absorbed colors are not visible.

  6. Visible Light Spectrum The color you see is what the object DOES NOT absorb (reflected)

  7. Chlorophyll a – Pigment that absorbs light energy • Absorbs reds and blues • Located in thylakoid membrane. Chloroplast are green because they don’t absorb green!

  8. 2. Carotenoids • Three pigments (Orange, Brown, and Yellow) that focus on absorbing blues and greens These colors are seen in the fall and in vegetables

  9. Calvin Cycle • Location: Stroma • Reactants: CO2 and ATP • Product: C6H12O6 (sugar)

  10. PHOTOSYNTHESIS OCCURS IN TWO PARTS SUMMARY LIGHT REACTIONS: Make energy in the form of ATP and e- carrier CALVIN CYCLE: Uses the ATP and e- carrier to make carbohydrates 1. Light absorption (by plant pigments) 2. Electron transport chain (making e- carrier) 3. Chemiosmosis (making ATP) 4. Calvin Cycle (making carbohydrates from CO2)

  11. Rate of photosynthesis • Photosynthesis is affected by the environment: • Light and Temperature • The rate of photosynthesis increases as light intensity increases. • Limited to a maximum rate once all available electrons are excited. • The rate of photosynthesis increases as temperature increases, over a certain range. • Rate peaks when the enzymes begin to become ineffective with increased temperature.

More Related