Catabolism - Breaking down complex organic compounds into simpler ones. Some is given off in heat. Reactions in which simpler substances are combined to form more complex molecules.
Reactions usually require energy.
Enzymes Overhead A. Descriptions 1. Proteins produced by living cells that catalyze chemical reaction 2. Names usually end in -ase 3. When enzyme and substrate combine, substrate is transformed and enzyme is recovered. Operate at optimum temperature and pH 5.