TY - JOUR AU - AB - Qeios · Definition, November 21, 2019 O Op pe e n n P Pe e e e r r R Re e v v iie e w w o on n Q Qe e iio os s N ational H uman Genome Research Institute (N H GRI) Source N ational H uman Genome Research Institute (N H GRI). Enzyme. An enzyme is a biolog ical catalyst and is almost always a protein. It speeds up the rate of a specific chemical reaction in the cell. T he enzyme is not destroyed during the reaction and is used over and over. A cell contains thousands of different types of enzyme molecules, each specific to a particular chemical reaction. Qeios ID: 108271 · https://doi.org/10.32388/108271 1/1 TI - Enzyme JF - Definitions DO - 10.32388/108271 DA - 2019-11-21 UR - https://www.deepdyve.com/lp/unpaywall/enzyme-j3cOLAnBPW DP - DeepDyve ER -