L08_A
L08_B
8.1 An organism’s metabolism transforms matter and energy, subject to the laws of thermodynamics 
8.2 The free-energy change of a reaction tells us whether or not the reaction occurs spontaneously 
8.3 ATP powers cellular work by coupling exergonic reactions to endergonic reactions 
8.4 Enzymes speed up metabolic reactions by lowering energy barriers 
8.5 Regulation of enzyme activity helps control metabolism