1. CHAPTER 6 AN INTRODUCTION TO METABOLISM Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Section A: Metabolism, Energy, and Life 1. The chemistry of life is organized into metabolic pathways 2. Organisms transform energy 3. The energy transformations of life are subject to two laws of thermodynamics 4. Organisms live at the expense of free energy 5. ATP powers cellular work by coupling exergonic reactions to endergonic reactions

3. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Fig. 6.1 The inset shows the first two steps in the catabolic pathway that breaks down glucose.

33. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Fig. 6.9 The energy released by the hydrolysis of ATP is harnessed to the endergonic reaction that synthesizes glutamine from glutamic acid through the transfer of a phosphate group from ATP.