Ch. 13 Lehninger Biochem Test Bank Study Guide Rated A+

The reaction ATP ---> ADP + Pi is an example of a_______reaction. A) homolytic cleavage B) internal rearrangement C) free radical D) group transfer E) oxidation/reduction {Ans: D}For the reaction A --->B, the Keq' is 10-6. If a reaction mixture originally contains 1 mmol of A and 1 mmol of B, which one of the following must be true? A) At equilibrium, there will be still be equal levels of A and B. B) The rate of the reaction is very slow. C) At equilibrium, the amount of A will greatly exceed the amount of B. D) The reaction will proceed toward B at a very high rate. E) Delta G'° for the reaction will be large and positive. {Ans: A}The hydrolysis of ATP has a large negative delta G'°; nevertheless it is stable in solution due to: A) entropy stabilization. B) ionization of the phosphates. C) resonance stabilization. D) the hydrolysis reaction being endergonic. E) the hydrolysis reaction having a large activation energy. {Ans: E}The hydrolysis of phosphoenolpyruvate proceeds with a delta G'° of about -62 kJ/mol. The greatest contributing factors to this reaction are the destabilization of the reactants by electostatic repulsion and stabilization of