Practice_Exam_2_with_answers - 1 Of the following the...

1) Of the following, the structure of ATP is most closely related to
A) an anabolic steroid.
B) a double helix.
C) RNA nucleotides.
D) an amino acid with three phosphate groups attached.
E) a phospholipid.
2) Whenever energy is transformed, there is always an increase in the
A) free energy of the system.
B) free energy of the universe.
C) entropy of the system.
D) entropy of the universe.
E) enthalpy of the universe.
3) Which of the following is the most randomized form of energy?
4) Which of the following would decrease the entropy within a system?
5) Which of the following reactions could be coupled to the reaction ATP + H
2
O ADP + Pi (-7.3 kcal/mol)? →
6) During a laboratory experiment, you discover that an enzyme-catalyzed reaction has a Δ G of +20 kcal/mol. You
double the amount of enzyme in the reaction, and the G now equals Δ
A) -40 kcal/mol.
B) -20 kcal/mol.
C) 0 kcal/mol.
D) +20 kcal/mol.
E) +40 kcal/mol.
7) For the reaction FUMARATE -> SUCCINATE, the G is +172 kcal/mol. Which of the following is FALSE? ∆
8) The Keq is 3.0 for the reaction glucose -> glucose-1P. If the initial concentration of glucose is 0.8 M, at
equilibrium what is the concentration of glucose-1P? 
The next questions are based on the following information. A series of enzymes catalyze the reaction X Y Z A. → → →
Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases
the activity of the enzyme.