BIOL 101 Lecture Notes - Lecture 4: Photosystem I, Light-Dependent Reactions, Kinetic Energy
Document Summary
2 steps: light reactions and dark reactions: h2o + co2 light reactions o2 + atp + nadph, nadph + atp + co2 dark reactions sugars. Organic matter = source of food: autotrophs (plants, heterotrophs (animals) Photosynthesis produces atmospheric o2 used in cellular respiration. 3 types of photo-synthesizers = plants, protista, & bacteria. Carbon dioxide + water glucose + oxygen. Leaf cross section epidermal layers at top/ bottom mesophyll cells in between. Cells nucleus, chloroplast, cell wall, large vacuole. Chloroplast thylakoids, stroma, granum, inner membrane, outer membrane. Thylakoid light reactions: energy from sunlight is absorbed by pigments. Photo capture light, synthesis synthesize sugar (glucose) 2 stages of photosynthesis: 1st = light reactions. Electrons passed to e carriers (nadph & atp) E used in 2nd stage: 2nd = dark reactions calvin cycle. The components of photosynthesis: photosynthesis takes place in organelles called chloroplasts, e for photosynthesis comes mostly from blue and red wavelengths of visible light, pigments in chloroplasts absorbed e.
