PhotosynthesisI. Terminology A. Autotroph 1. photoautotrophs 2. chemoautotrophs B. Heterotroph C. Producers versus Consumers II. Comparing Cellular Respiration with Photosynthesis III. Does Produced oxygen come from water or carbon dioxide? A. Radioactive Tracers B. Two Stages of Photosynthesis 1. Light Reactions 2. Calvin Cycle (Dark Reactions) IV. Details of the Light Reactions A. Terminology 1. organ, tisse, mesophyll 2. organelle chloroplast 3. thylakoids 4. stomata B. Electromagnetic Radiation (EMR; Light) 1. Why are plants green? 2. Absorption Spectra a. carotenoids b. chlorophyll a c. chlorophyll b 3. Thomas Engelman Algal Filament Experiments C. Photosystem = Pigment Cholorphyll + Protein 1. Porphyrin Ring 2. The Reaction Center 3. Excited versus Ground States D. Photossystem 1 (called P700; PSI) and 2 (called P600; PSII) 1. cyclic photophosphorylation 2. noncyclic photophorylation E. Enters Electron Transport Chain via the same mechnanism as the Chemiosmotic Hypothesis F. ATP synthesis in plants versus animals V. Details of the Calvin Reactions A. Carbon fixation B. Reduction C. Regeneration of the carbon dioxide acceptor Practice Problem: If you are to generate 1 molecule of glucose (need 6 CO2) how many ATP and NADPH must be consumed? 1. First how much CO2 will you have to fix? 2. Then how many ATP, NADPH? 3. Then what if 5 molecules of glucose?