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.
The pH optimum of an enzyme may be very different from the normal plasma or intracellular average pH of 7.35 - 7.45; some enzymes have pH optima as low as 2 - 3, or as high as 9 - 10, and therefore little or no activity around pH 7.his graph shows the pH dependence of an enzyme that has maximum activity at pH 7.1 (i.e. an optimum pH of 7.1), and a relatively broad range of pH around that optimum at which it has activity. There would still be measurable activity at pH 6 or pH 8.