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 play a large part in respiration as it helps to catalyse the reaction. Enzymes are affected greatly by pH. Enzymes are said to have an optimum pH. This means that when the pH is greater than the optimum, the enzyme will be denatured and no longer be able to catalyse the reaction. This is because enzymes are proteins, and they consist of long strings of amino acids, of which hydrogen plays a significant part. Acids are substances that contain #H^+# ions, while alkalis contain #OH^-# ions - so pH is essentially a measure of how many #H^+# ions are in a substance.