Spring 2009 Exam 3 p. 1 BIO 311c Brand
BIOLOGY 311C - Brand
Spring 2009
NAME (printed very legibly) ___________________KEY_________________ UT-EID ________________
EXAMINATION 3
Before beginning, check to be sure that this exam contains 7 pages (including front and back) numbered
consecutively, and that you have been provided with a clean Answer Sheet. Then immediately print your name
and UT-EID legibly at the top of this page. Also print and bubble in your name and your UT-EID (not your
social security number) on the front of the Answer Sheet in the spaces provided. The first 37 questions are
“multiple choice”, with only one correct answer. Mark the letter corresponding to the correct answer to each of
these questions in the appropriate location on the Answer Sheet, using a No. 2 pencil. Write answers to
Questions 38 – 41 directly on this exam, in the spaces provided with the questions. Print neatly if your
handwriting is likely to be difficult to read. Turn in both this exam and the Answer Sheet after checking to be
sure that your name is written clearly on both, and that all questions have been answered in the appropriate
locations. You must turn in your exam on or before 9:55 a.m.
1. Which one of the following would you expect to go in the reverse direction under standard conditions?
a. The hydrolysis of ATP to ADP + Pi
b. The hydrolysis of ATP to A + inorganic triphosphate
c. The dehydration of glucose + Pi to glucose-6-phosphate
d. The de-protonation of a carboxylic acid at pH 9
2. How many “high energy” phosphate bonds occur in the nucleotide dCDP?
a. 0
b. 1
c. 2
d. 3
3. Enzymes speed up the rates of chemical reactions by:
a. lowering their energy of activation.
b. increasing their energy of activation.
c. decreasing their ΔG° value.
d. increasing their ΔG° value.
4. An apoenzyme is a(n):
a. enzyme that consists of less than 20 amino acids.
b. surface to which an enzyme binds.
c. substrate that also acts as an inhibitor of the enzyme.
d. polypeptide component of a conjugated protein.
5. A typical enzyme is expected to:
a. function rapidly over a narrow range of temperatures.
b. function rapidly over a broad range of pH values.
c. contain an adaptable binding site so it can react with many different kinds of substrate.
d. be a fibrous protein.
