? 2017 Pearson Education, Inc. Lecture Presentations byNicole Tunbridge and Kathleen Fitzpatrick Chapter 8An Introduction to Metabolism 1 The Energy of Life The living cell is a miniature chemical factory where thousands of reactions occur Cellular respiration extracts energy stored in sugars and other fuels Cells apply this energy to perform work Some organisms even convert energy to light, as in bioluminescence ? 2017 Pearson Education, Inc. 2 Concept 8.1: An organism?s metabolism transforms matter and energy, subject to the laws of thermodynamics Metabolism is the totality of an organism?s chemical reactions Metabolism is an emergent property of life that arises from orderly interactions between molecules ? 2017 Pearson Education, Inc. Enzyme 1 Reaction 1 Starting molecule