Ritchie Valens. Richard Steven Valenzuela (May 13, 1941 â February 3, 1959), known as Ritchie Valens, was an American singer, songwriter, and guitarist. A rock & roll pioneer and a forefather of the Chicano rock movement, Valens' recording career lasted eight months, as it abruptly ended when he died in a plane crash.
Why do enzymes in our stomach work best at a pH of 7? Actually the pH of the stomach very acid relative to pH 7 (between pH 1-4). An acidic stomach is optimal for the breaking of hydrogen bonds that makes up the complex compoundsâ¦ in the food we ingest, like proteins.
Enzymes - well, they don't work on cookies, but they work on substrates. Therefore, the substrate concentration in an enzyme's environment has a major effect on how much work can be done. There's only so much substrate an enzyme can work on, just like there's so many cookies that you could possibly eat. Let's say that one enzyme works on one substrate at a time. Let's also say in a cell, there are ten units of one type of enzyme but only four substrates for the enzyme to work on.