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.
Such bindings may activate an enzyme or inhabit the activity of the enzymes. Such enzymes are called allosteric enzymes. The components that bring about the activation or inactivation of allosteric enzymes are called allosteric affectors or effectors. The affecters block the activity and effectors activate the activity.