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.
Above or below an enzymeâs optimum pH, its activity is lower. The optimum pH of a particular enzyme corresponds to the pH of its natural environment. For many enzymes, this corresponds to pH values of around 7. For pepsin, which is active in the stomach, the optimum pH is 2 (the pH of the stomach).bove or below an enzymeâs optimum pH, its activity is lower. The optimum pH of a particular enzyme corresponds to the pH of its natural environment. For many enzymes, this corresponds to pH values of around 7. For pepsin, which is active in the stomach, the optimum pH is 2 (the pH of the stomach).