BIOLOGY 151 Lecture Notes - Lecture 25: Photosynthetic Pigment, Cellular Respiration, Thylakoid
11 Dec 2017
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Uses co2 , h2o , and sunlight to create glucose and oxygen. Absorbs light in visible range (400nm - 700nm) Absorption bumps electron in pigment to excited state. Create atp and nadph for use in calvin cycle. Light is absorbed by chloroplasts in photosystem ii. High energy passed down through a chain of chloroplasts a. b. Excited electron from first pigment moves to next pigment. Electron in the next pigment gets excited and moves to next pigment. Chain continues until the electron reaches the special pair pigment c. H2o donates missing electron to first pigment (o 2 released) Excited electron is passed down an electron transport chain to. Further energizes electrons in chlorophyll of ps i. Exergonic redox rxns provide energy to pump protons from stroma to lumen a. Creates electrochemical gradient used to power atp synthase. Electron moves through chlorophyll in ps i and ii. H+ ion moves from stroma to lumen creating gradient.
