PSYC 301 Lecture Notes - Lecture 3: Ribulose, Pheophytin, Photosynthetic Reaction Centre
Document Summary
Plants are photoautotrophs, use sunlight to make sugars from h. 2 and other inorganic molecules: heterotrophs, obtain organic material from other organisms, consumers of the biosphere, almost all heterotrophs, including humans need autotrophs for survival (food and o. Tracking the atoms through photosynthesis: photosynthesis overall equation, 6 co. 2: hydrogen molecules from water get incorporated into sugar, photosynthesis is endergonic, co. 2 is reduced to sugar; water is oxidized to o. 2: cellular respiration- exergonic, sugar is oxidized to co2; o2 is reduced water. Sites of photosynthesis in plants: located within the leaves of plants, the internal membranes: Thylakoids: flattened, sac- like structures called, some of which form stacks called granum: thylakoid membranes contain large quantities of pigments. Most common pigment is chlorophyll: fluid-filled space between the thylakoids/ inner membrane is the stroma. Photosynthesis two reactions: photosynthesis consists of light reactions -the photo part carbon fixation in the calvin cycle (the synthesis part)
