Cellular Respiration and Photosynthesis Outline 3.6

In plants and other autotrophs, both processes may occur within individual cells This is possible because plants contain both chloroplasts and mitochondria Photosynthesis uses the products of cellular respiration (CO2) and cellular respiration uses the products of photosynthesis (O2)

Fig. 1 (p. 179)

Overall Reactions Respiration Photosynthesis Reactants Products Energy Glucose (organic molecules) CO2 + H2O Products Energy released stored

Organelle Structure and Function Mitochondrion Chloroplast Inner membrane functions Electron transport H+ ion transport ATP synthesis Contains DNA, ribosomes Yes Location of H+ reservoir Intermembrane space Thylakoid lumen Location of ATP synthase Matrix Stroma

Source of Electrons and Carrier Molecules Respiration Photosynthesis Source Of Electrons Glucose (organic molecules) water Carrier Molecules NAD+, FAD NADP+

Electron Transport System Respiration Photosynthesis Electron Source NADH and FADH2 water Electron sink (acceptor) oxygen NADPH Products ATP ATP and NADPH

ATP Synthesis yes Respiration Photosynthesis H+ ions pumped by ETC ATP synthesis by chemiosmosis Membrane-embedded ATPase complex