BIOL 1107 1nd Edition Lecture 7 Outline of Last LectureI. WaterII. Adhesion & CohesionIII. Water as a SolventIV. pHV. Acids & BasesOutline of Current Lecture I. pH and BiologyII. pH in the Human BodyIII. BufferCurrent LectureI. pH and BiologySulfuric acid + egg denaturing protein (ovalbumin)Breaking bonds b/n side chains Denature & RenatureIonic bonds more susceptible to pH, because H+ is added to carboxyl and structure breaks apartThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Potential Q: What happens if you raise pH of a certain amino acid?Quaternary- two proteins coming togetherHow do digestive enzymes still function? (with pH being so low)They don’t have ionic bondsEx: pepsin- has lots of acidic residues Also, proteins have an optimum pHII. pH in Human BodyHuman blood pH = 7.35-7.45What causes blood pH to change? When you exercise, lactic acid is released (~1-2 pH)Carbon dioxide gets into blood and combines with H2OThe reaction above is an example of the buffering system in the human body. III. BufferWhat is a buffer? Weak acid + conjugate baseHow would a reaction be effected if pH goes up? pH increases, [H+] decreasesThe CO2 and H2O reaction above shifts to the right when pH increase and [H+]
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