University:
Boston University
Course:
GMS BI 777 | Techniques in Biomedical Research
Academic year:

2021
Views:

297

Pages:

12
Author:

golicljivzul8

Part I: Multiple choice –Circle the choice that best answers the question. Do not write the letter in the margin to indicate your answer, circle it. 3 points each. 1. Which of the following is the best description of an enzyme (Text, Ch11 ?1) a. they allow chemical reactions to proceed very quickly b. they increase the rate at which a chemical reaction approaches equilibrium c. they make a reaction thermodynamically favorable d. all of the above e. none of the above 2. Pyruvate decarboxylase catalyzes the reaction shown below. Based on this information, you can say this enzyme is a(n) (text, Ch 11, ? 3b) a. b. c. d. e. oxidoreductase transferase hydrolase lyase ligase 3. Which amino acid below is least likely to participate in general acid-base catalysis (Companion Ch11, ? 10) a. lysine b. cysteine c. histidine d. aspartate e. glycine 4. Which of the following statements is true about the region of the graph below where [S]<>[S] b) When [S]< therefore not likely a great catalyst. Enzyme 3 binds substrate tightly and TS relatively weakly, => therefore it will bind substrate but not likely activate it for transformation to P since it does not preferentially bind the TS