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Mitochondria & Chloroplasts Mighty Mitochondria Cellular distribution of mitochondria Fluorescence micrograph of a Cos-7 cell. Mitochondria (green) & Microtubules (red) Copyright 2008 by Saunders/Elsevier. All rights reserved. Fig. 19-1 Electron micrograph of a thin section of a mitochondrion Fig. 19-1 Copyright 2008 by Saunders/Elsevier. All rights reserved. Comparison of mitochondria & bacteria organization Fig. 19-2 Copyright 2008 by Saunders/Elsevier. All rights reserved. Mitochondrial DNA Glycolysis and Lipid Oxidation Provide AcetylCoA to the Mitochondria for the Citric Acid Cycle Citric Acid Cycle Generates Reducing Potential as NADH and FADH2 used for Oxidative Phosphorylation Disease causing mutations of mitochondrial proteins Fig. 19-6 Copyright 2008 by Saunders/Elsevier. All rights reserved. Machinery for importing proteins into mitochondria Copyright 2008 by Saunders/Elsevier. All rights reserved. Fig. 18-3 Import of proteins into the mitochondrial matrix Fig. 18-4 Copyright 2008 by Saunders/Elsevier. All rights reserved. Import of the ADP/ATP antiporter into the inner membrane Fig. 18-5 Copyright 2008 by Saunders/Elsevier. All rights reserved. Roles of mitochondria in apoptosis Fig. 46-15 Copyright 2008 by Saunders/Elsevier. All rights reserved. Clever Chloroplasts Electron micrograph of a thin section of a chloroplast Fig. 19-7 Copyright 2008 by Saunders/Elsevier. All rights reserved. Photosynthetic machinery of chloroplasts and cyanobacteria Copyright 2008 by Saunders/Elsevier. All rights reserved. Fig. 19-7 Chloroplast DNA Tobacco Chloroplast DNA Comparison of photosynthetic systems that produce ATP Copyright 2008 by Saunders/Elsevier. All rights reserved. Fig. 19-8 Light Reactions • Synthesis of ATP and NADPH • Series of reaction centers transport e-'s & generate H+ gradient – Light harvesting antennae (chlorophyll & other pigments – Photosystem II – Quinone – Photosystem I – Ferridoxin – NADP reductase Dark Reactions • Calvin Cycle – Synthesis of triose phosphates Carboxylation Pathways for protein import into chloroplasts Fig. 18-6 Copyright 2008 by Saunders/Elsevier. All rights reserved.