Biochem Final- Week 11 Study Guide Rated A+

A chemical reaction with a negative enthalpy change and a negative entropy change ________. Select one: A. could be either spontaneous or nonspontaneous depending on the temperature B. must be nonspontaneous C. must be spontaneous D. is not possible {Ans: A. could be either spontaneous or nonspontaneous depending on the temperature}Phosphorylation at the expense of ATP is catalyzed by ________. Select one: A. phosphatases B. protein kinases C. phosphoryl isomerases D. All of the above {Ans: B. protein kinases}For a step in a reaction pathway to serve as a control point it should be ________. Select one: A. endergonic B. near equilibrium C. endothermic D. irreversible {Ans: D. irreversible}Consider the synthesis of a biopolymer in which the addition of successive monomers occurs by the same kind of reaction(s). The synthesis of the polymer is a ________ pathway. Select one: A. linear B. branched C. spiral D. cyclic {Ans: C. spiral}The glucose 6-phospate isomerase reaction is a near-equilibrium reaction. Therefore, at any time in a cell there is Select one: A. about equal amounts of glucose- 6-phosphate and fructose -6-phospate. B. little or no glucose- 6-phospate remaining. C. an accumulation of fructose 6-phosphate. D. All of the