1. Enzymes have known attributes and functions. Which of the following is NOT its common attribute or function? A. enzymes are specific B. enzymes may be used many times for a specific reaction C. enzymes provide activation energy for reactions D. enzyme activity can be regulated 2. Evaluate the following statements and identify the best that can describe how a lysozyme works.? A. It cuts the bond in a polysaccharide, by holding six sugars in a row in its active site, and adding a water molecule, causing hydrolysis. B. It is responsible for the cleaving of amino acid chains via the ping-pong mechanism. C. It cleaves the phosphodiester bond in nucleic acids, via hydrolysis. D. It hydrolyzes bonds in lipids, causing a split in a fatty acid chain.

Researchers have identified an enzyme that can catalyze two different chemical reactions. Which of the following is most likely true based on this finding? A B C D The reactants involved in the two reactions are very similar in their charge and shape. The reactant in one reaction acts as an allosteric inhibitor while the reactant in the sec- ond acts as an allosteric activator. The enzyme contains both alpha-helices and beta-sheets in their secondary structures. The catalytic activity of the enzyme is dependent on both competitive inhibition and al- losteric regulation.

19. What is the optimal pH for catalase? Why do you think it becomes less effective at high or low pH? 20. Can you think of anywhere in the human body where enzymes would work BEST at a high pH? Please give an example and draw what that graph might look like. 21. What is the optimal temperature for catalase? Why do you think it becomes less effective at high or low temperatures? 22. Can you think of any organisms that would have enzymes specifically adapted to extreme low or high temperatures and would therefore function best at a different part of the graph? Please give an example and draw what that graph might look like.