logging in or signing up Photosynthesis Callia Download Post to : URL : Related Presentations : Let's Connect Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 8372 Category: Entertainment License: All Rights Reserved Like it (5) Dislike it (0) Added: January 01, 2008 This Presentation is Public Favorites: 2 Presentation Description No description available. Comments Posting comment... By: shreeram1996 (34 month(s) ago) please let me downloadt? Saving..... Post Reply Close Saving..... Edit Comment Close By: shreeram1996 (34 month(s) ago) very good Saving..... Post Reply Close Saving..... Edit Comment Close By: surukumawat (34 month(s) ago) nice... Saving..... Post Reply Close Saving..... Edit Comment Close By: likhitshirke (35 month(s) ago) awesome ppt Saving..... Post Reply Close Saving..... Edit Comment Close By: mynameisgum (35 month(s) ago) this presentation is perfect Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript Photosynthesis: Photosynthesis Chapter 8-2 and 8-3 Photosynthesis : Photosynthesis Photosynthesis: uses the energy of sunlight to convert water and carbon dioxide into high energy carbohydrates 6CO2 + 6H2O ---light C6H2O6 + 6O2 Carbon dioxide + water --- light sugars + oxygen Photosynthesis Equation: Photosynthesis Equation 6CO2 + 6H2O ---light C6H2O6 + 6O2 Reactants: carbon dioxide water Products: carbohydrates oxygen Who does photosynthesis? : Who does photosynthesis? Plants and other organisms that contain the pigment, chlorophyll Chlorophyll is stored in the chloroplasts of a plant cell Where does photosynthesis happen? : Where does photosynthesis happen? Photosynthesis occurs within the chloroplasts Chloroplasts: Chloroplasts Thylakoids- photosynthetic membranes Granum- stack of thylakoids Stroma- space outside the thylakoids Photosystems- clusters of pigment & protein that absorb light energy (I & II) Two Parts of Photosynthesis: Two Parts of Photosynthesis Light dependent reactions- take place within the thylakoid membranes Light independent reactions (Calvin Cycle)- takes place within the stroma Light Dependent Reactions: Light Dependent Reactions Figure 8-10 on page 211 Sunlight is absorbed by Photosystem II The sunlight breaks down water molecules stored within Photosystem II The water is broken and its electrons gain energy These excited electrons leave the photosystem and are passed through an electron transport chainLight Dependent Reactions: Light Dependent Reactions As the electrons move, they provide energy to move H+ ions from the stroma across the thylakoid membrane into the thylakoid When the electrons reach Photosystem I, they are reenergized by sunlight Light Dependent Reactions: Light Dependent Reactions The reenergized electrons are picked up by NADP and are used to create NADPH At the same time, electrons inside the thylakoid create a concentration gradient of H+ ions This gradient is used to power an enzyme called ATP synthase, which synthesizes ATP Light Dependent Reactions : Light Dependent Reactions Reactants: water sunlight NADP ADP Products: Oxygen NADPH ATP Electron Transport : Electron Transport ATP Synthase: ATP SynthaseLight Independent Reactions: The Calvin Cycle: Light Independent Reactions: The Calvin Cycle The Calvin Cycle uses the NADPH and ATP produced in the light dependent reactions to create high energy sugars Figure 8-11 on page 212The Calvin Cycle : The Calvin Cycle Carbon dioxide molecules from the atmosphere enter the stroma The carbon dioxide joins with other carbon molecules to form 3-carbon molecules called PGA The PGA molecules use energy from ATP and NADPH to convert into PGAL The Calvin Cycle : The Calvin Cycle Some of the PGAL leaves the cycle and is used in other parts of the plant cell But the majority of PGAL molecules are converted back into PGA and continue in the cycle After six rounds of the Calvin Cycle, one molecule of glucose is produced The Calvin Cycle : The Calvin Cycle Reactants: Carbon Dioxide NADPH ATP Products: Glucose The Calvin Cycle : The Calvin Cycle Photosynthesis: Photosynthesis You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.