BIOL 2021 Lecture Notes - Lecture 10: Plastoquinone, Water Splitting, Ferredoxin
12 May 2013
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Lecture 10: chapter 14 chloroplasts and photosynthesis. Functions of membranes: maintain ion gradients, for energy conversion and signalling. Chemiosmosis energy conversion using a membrane: chemi = atp synthesis, osmosis membrane transport, figure 14. 1. Proton gradient used to make atp: h+ gradients for atp synth, active transport and bacterial locomotion (fig 14. 3 b) Mito: fat + carb + o2 co2 + h2o. Chloros: h2o + co2 carbs + o2. Chloroplast envelope has an outer membrane that is essentially permeable (small molecules) Inner membrane not so permeable transporters (transport proteins) Mitochondrial matrix = chloroplast stroma: metabolic enzymes, own dna, own rna, ribosomes. But in the chloroplast we have: thylakoid membrane. Electron transport light capturing proteins atp synthase: thylakoid space, granum (pl. grana) Photosynthetic electron transfer sunlight electron transfer. Products: h2o + nadp 0. 5 o2 + nadph + h+ 3 co2 + 9atp + 6nadph + water g-3p + 9adp + 8pi + 6nadp+ G3p sugar, fatty acids, amino acids = carbon skeletons.
