1 / 26

Photosynthesis (8.2)

Photosynthesis (8.2). State Standard SB3A. Explain the cycling of energy through the processes of photosynthesis and respiration. 8.2 Photosynthesis. Overview. Photosynthesis traps light (solar) energy & converts it to chemical energy in the form of carbohydrates (food).

tcortes
Télécharger la présentation

Photosynthesis (8.2)

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 (8.2) State Standard SB3A. Explain the cycling of energy through the processes of photosynthesis and respiration.

  2. 8.2 Photosynthesis Overview Photosynthesis traps light (solar) energy & converts it to chemical energy in the form of carbohydrates (food). *Don’t forget – photosynthetic organisms must also break down some of those carbohydrates to form ATP for themselves.

  3. 8.2 Photosynthesis *Label the reactants & products in the equation below Overview cont’d The trapped light energy is used to convert the raw materials CO2 & H2O into carbohydrates & O2 PHOTOSYNTHESIS EQUATION

  4. 8.2 Photosynthesis Overview cont’d The key to absorbing light is a green pigment called chlorophyll, found in chloroplasts. Chloroplast Parts Thylakoid – looks like a pancake (flattened sac) Granum (pl. grana) – stack of thylakoids Stroma – space between grana – gel- like matrix

  5. requires absorption of light energy. broad, flat leaves increase the amount of light that can be absorbed supports almost all life on Earth either directly or indirectly. converts light energy to chemical energy usually in the form of glucose (carb). Occurs in the chloroplasts. Overview cont’d 8.2 Photosynthesis Photosynthesis…

  6. Cellular Energy Chapter 8 8.2 Photosynthesis Overview cont’d Photosynthesis occurs in 2 phases. • Light-Dependent reactions * also called light reactions * occur in the thylakoid membrane. * This is the photo part of photosynthesis. • Light-Independent reactions *also called the Calvin Cycle * occur in the stroma * This is the synthesis part of photosynthesis

  7. Cellular Energy Chapter 8 8.2 Photosynthesis Part 1 Light Dependent Reactions • Location: Thylakoid • Splits water molecules • Produces power for the • Calvin Cycle

  8. Products ATP NADPH (a high energy electron carrier) Oxygen (formed from the splitting of water by light) Where do they end up? ATP and NADPH go on to power the next group of reactions Oxygen is released out of the cell and we breathe it in. Part 1 Light DependentReactions Cont’d 8.2 Photosynthesis

  9. Cellular Energy Chapter 8 8.2 Photosynthesis Part 2: The Calvin Cycle (Light-Independent) Location: Stroma • stores energy in organic molecules such as glucose. • powered by the products of • the light dependent • reactions

  10. Uses carbon dioxide (CO2) from the atmosphere & energy from the light-dependent reactions to fuel its processes. Products: glucose or other sugars (which are stored) * some are used by the plant * others are used by heterotrophs Part 2: The Calvin Cycle (Light-Ind) cont’d 8.2 Photosynthesis

  11. 8.2 Photosynthesis Part 2: Calvin Cycle (Light Ind.) cont’d

  12. 8.2 Photosynthesis Part 2: Calvin Cycle (Light Ind.) cont’d The Calvin Cycle is the sugar factory! Calvin Cycle Chocolate Chips Cotton Candy Candy Cane Coca Cola

  13. Photosynthesis Graphic Organizer 8.2 Photosynthesis

  14. A B C D Cellular Energy Chapter 8 CDQ 3 Chapter Diagnostic Questions At the end of the Calvin cycle, where is energy stored? NADPH ATP chloroplast glucose

  15. A B C D Cellular Energy Chapter 8 FQ 5 8.2 Formative Questions Where in the plant cell does photosynthesis take place? chloroplasts Golgi apparatus mitochondria vacuoles

  16. A B C D Cellular Energy Chapter 8 CAQ 1 Chapter Assessment Questions Look at the following figure. Which part of the chloroplast is a sac-like membrane arranged in stacks? grana stroma thylakoids Golgi apparatus

  17. A B Cellular Energy A B Chapter 8 STP 1 Standardized Test Practice Which metabolic process is photosynthesis?

  18. A B C D Cellular Energy Chapter 8 STP 2 Standardized Test Practice At the beginning of photosynthesis, which molecule is split to produce oxygen (O2) as a waste product? CO2 H2O C6H12O6 3-PGA

  19. A B C D Cellular Energy Chapter 8 STP 3 Standardized Test Practice Which molecule helps provide the energy that drives this cycle? 3-PGA CO2 NADPH rubisco

More Related