Campbell Biology Chapter 9
Subject:
? 2017 Pearson Education, Inc. Lecture Presentations byNicole Tunbridge and Kathleen Fitzpatrick Chapter 9Cellular Respiration and Fermentation 1 Life Is Work an Introduction Living cells require energy to do work: assembling polymers, membrane transport, etc. Animals can obtain energy by feeding on other animals or photosynthetic organisms Energy flows into an ecosystem as sunlight and leaves as heat The chemical elements essential to life are recycled Photosynthesis generates O2 and organic molecules, which are used in cellular respiration Cells use chemical energy stored in organic molecules to generate ATP, which powers work ? 2017 Pearson Education, Inc. 2 Light energy ECOSYSTEM Photosynthesis in chloroplasts Cellular respiration in mitochondria CO2 + H2O + O2 Organic
