Scene at the Signing of the Constitution of the United States. The Constitutional Convention (also known as the Philadelphia Convention, the Federal Convention, or the Grand Convention at Philadelphia) took place from May 25 to September 17, 1787, in Philadelphia, Pennsylvania.
In living cells, WHAT serve as biological catalysts. Each acts on a specific substance called the enzyme's substrate and each catalyzes only one reaction. As catalysts, enzymes typically accelerate chemical reactions. The enzyme molecule has an active site, a region that will interact with a specific chemical substance.
1 Reaction specific enzymes, these enzymes as the name suggests reacts to specific reactions only. 2  Group specific enzymes are those that catalyze a group of substances that contain specific substances. 3  The enzyme activity can be controlled but the activity of the catalysts can not be controlled. 4  All enzymes are proteins.