An enzyme is a catalyst that helps to speed up the rate of a reaction by lowering the activation energy of a reaction. There are many enzymes in the human body, without which lots of important reactions would never take place. Cellular respiration is one example of a reaction that is catalysed by enzymes.
Sullivan Act Tim Sullivan, a major Irish criminal passed the Sullivan Act in 1911 to help his constituents rob strangers or to help them against Italian incomers. That is the crux of story that goes with a very early gun control law.
President Woodrow Wilson vetoed the bill, but the House of Representatives overrode the veto, and the Senate did so as well the next day. The Volstead Act set the starting date for nationwide prohibition for January 17, 1920, which was the earliest day allowed by the Eighteenth Amendment. The Amendment was in effect for the following 13 years.