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- Plants containing only chlorophyll b are exposed to radiation with the following wavelengths: 10nm (x- rays), 450nm (blue light), 670nm (red light), and 800nm (infrared light). Which plants harness the most energy for photosynthesis? X-ray irradiated plants Blue light irradiated plants Red light irradiated plants Infrared irradiated plantsThe Overall Free Energy Change for Photosynthetic NADP+ Reduction What is the overall free energy change (G) for noncyclic photosynthetic electron transport? 4 (700-nm photons) + 4 (680-nm photons) + 2 H2O + 2 NADP+O2 + 2 NADPH + 2H+As you learned in this chapter, cell membranes arc required for electron transfer phosphorylation. Thylakoid membranes in chloroplasts serve this purpose in photosynthetic eukaryotes. Prokaryotic cells do not have this organelle, but many are photosynthesizers. How do you think they carry out the light-dependent reactions, given that they have no chloroplasts?
- Dlagram 4: The Light Reactions of Photosynthesis STROMA ow soncedration Oytnho e mples Photoeystem B Photoeystan I NADP Light OPM THYLAKOID SPACE gh r cenentration Cavin Cyele Thylakoid membrane ATP STROMA dow H ooncentration) ythse ADP Diagram 4 shows a single thylakoid membrane taken from a chloroplast inside of a leaf cell. The events of the light dependent cydle that take place along the thylakoid membrane are shown. ight energy is captured by ATP synthase O Photosystems I and II D NADP+ reductase O The thylakoid membrane's lipid structuresDiagram 4: The Light Reactions of Photosynthesis STROMA dow concentralion Photonystem B Cytch e Photosystem Light omplex Light NADP reductoe NADP NADPH THYLAKOID SPACE igh ooncentration) Cavin Cyle Thylakid menbrane ATP STROMA ow H eone sythase ADP ATP Diagram 4 shows a single thylakoid membrane taken from a chloroplast inside of a leaf cell. The events of the light dependent cycle that take place along the thylakoid membrane are shown. Light energy is captured by O ATP synthase O Photosystems I and II O NADP+ reductase The thylakoid membrane's lipid structures Drovioushhmi BloInteractive Photosynthesis a) Label PSI and PSII. b) Draw the path of the electron transport chain. Diagram 6 Q Search O CU M Table 1: Descriptions of the steps in the light reactions. What is happening with matter? Structure PSIL L ( Ji E C The Events of the Light Reactions For PSII, the cytochrome complex, and PSI, draw and label what happens at that structure on Diagram 6. Then describe the events in a bulleted list in Table 1. Animations Student Worksheet Thylakold stroma Thylakoid lumen What is happening with energy? 40
- Diagram 4: The Light Reactions of Photosymtnes STROMA dow soncentrations Photoeystem PhotoeytmE oomple Light Ligt THYLAKOID SPACE Ohigh concentration) Thylakold membrane ATP wynthase STROMA low H concentration) ADP en from a chloroplast inside of a le the light dependent cyde that take place along the thylakoid membrane a Diagram 4 shows a single thylakoid membrane In photosystem I and II, an electron will O be transferred to ATP be transferred to NADPH lose energy gain energyLight Reactions Dark Reactions Sugar Chloroplast Light ATP NADPH Calvin cycle NADP ADP Granum co. Figure 7.3. Processes of photosynthesis. The light reactions directly require light energy from the sun. The "dark reactions" are driven by the high energy electrons produced by the light reactions. The synthesis reactions happen in the daytime, but are sometimes called "dark" reactions because light energy is not directly required. What kind of energy is required to run the synthesis reactions? Where does that energy come from?3:14 X photosynthesis workshee Topic # 14 Photosynthesis I Titg or false The point of phốtasynthesis is to make sugar. outer membrane inner membrane stroma - thylakoid channel interconnecting thylakoids granum (stack of thylakolds) D nipni hal 2. In the diagram above where do the light-dependent reactions eccur 3the above diagram, where do the light-independent reactions oceur? 4. H which part of photosynthesis is light energy converted mto chemieal energy? 5. What is the point of the light-independent reactions? 6. True or false. The light-dependent reactions happen during the day and the light-independent reactions happen during the night. 7. True or false. Photosynthesis is the process by which plants USE energy to stay alive.
- avelengths (Choose J |Choose | graph plotting a pigment's light absorption versus wavelength reaction- center complex is system consists of a reaction-center complex surrounded by nt-harvesting complexes absorption spectrum spectrophotometer molecule located in the reaction center accepts excited ctrons photosystem light harvesting complex reaction-center chlorophyll a of this photosystem iş called P680 ause it is best at absorbing a wavelength of 680 nm. primary electron acceptor wavelength PSI estion 4 PS II action spectrum >Question 6 Review the two stages of photosynthesis. Match the term and its description. Each term can only be used once. thylakoid membranes [ Choose ] stroma | Choose Convert light energy to chemical energy. Release oxygen as a by- product [ Choose | > >Photosynthesis is divided into light reactions and dark reactions. Define the purpose of each of these as well as the overall inputs and outputs for each stage. Edit View Insert Format Tools Table 12pt v Paragraph |BIU Av S OTE A O FEB étv MacBook Air F11 80 F8 F9 F10 F6 F7 F4 F5 2 F3 * へ 23 $ 6. 8. 4 R T Y U E