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 They are usually specific to only one reaction. 2  The part of the Enzyme that acts a Catalyst is called the Active Site. 3  The rest of the Enzyme is much larger and is involved in maintaining the specific shape of of the Enzyme. 4  When a reaction involving an Enzyme occurs, a Substrate is turned into a Product. Enzymes work by lowering the Activation Energy of a reaction. 2  The Activation Energy of a reaction is lowered by putting stress on the bonds within a molecule, or by holding molecules close together. 3  This increases the likelihood of a reaction, and so lowers the energy required to begin it.