This is the true story of Ritchie Valens, a young rock and roll singer who tragically died in a plane crash at age 17. The film follows Ritchie from his days in Pacoima, California where he and his family make a meager living working on farms to his rise as a star. The film also focuses on Ritchie's friendship and rivalry with his older brother Bob Morales and his relationship with Donna Ludwig, his girlfriend.
Making the world better, one answer at a time. It depends on what type of Enzyme. Enzymes have different optimum pH depending on the environment they work in, for example and enzyme in the stomach of a human would have a pH of about 2 but an enzyme in human saliva has an optimum pH of 5.6.
For phenol to be effective the pH of the solution must vary according to what is being extracted. In the case of DNA purification a pH of 7.0â8.0 is used. If the aim of an experiment is to obtain samples of purified RNA, a pH of around 4.5 is used.here are two reasons why phenol makes such an effective purifier for nucleic acid samples. The first is that it is a non-polar compound. Because nucleic acids are highly polar, they do not dissolve in the presence of phenol.