Which of the following applies to a reaction driven by an enzyme? Select all that apply. Marks removed for incorrect selection(s). Click on "next page" at the bottom of the screen after completing your response. a. The enzyme is consumed as part of the reaction. b. The enzyme lowers the activation energy of the transition state compared to an identical but uncatalyzed reaction. c. None of the other answers are correct d. The enzyme increases the temperature of the solution to increase the kinetic energy of the reactants. e. The enzyme lowers the free energy change in the reaction compared to an identical but uncatalyzed reaction.
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Step 1: An enzyme is a biological catalyst that speeds up chemical reactions by lowering the activation energy required for the reaction to occur. Show more…
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Which of the following statements concerning enzyme-catalyzed reactions is NOT correct? (a) Enzymes increase the reaction rate by lowering the activation energy (b) Enzymes increase the reaction rate by stabilizing the transient state of reactants (c) Enzymes increases the reaction rate by increasing the equilibrium constant (d) Enzyme activity may be affected by changes in pH (e) None of the above 4. A competitive inhibitor of an enzyme has all of the following properties EXCEPT; (a) Has a structure similar to the substrate (b) May have a higher affinity to the enzyme than the substrate (c) Binds to the active site of the enzyme (d) Increases the Km value (e) None of the above
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Which of the following are accurate statements about enzymatic reactions? Select any that apply. a. The addition of reaction-specific enzymes can increase the reaction rate. b. An enzyme reduces the activation energy of a chemical reaction. c. Enzymes are unchanged at the end of a chemical reaction. d. An enzyme will not increase the activation energy of a chemical reaction. e. An enzyme acts as a catalyst in a chemical reaction.
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Which of the following are true of enzyme catalysts: A) They change the equilibrium constant of a reaction to favor the formation of products. B) To be effective, the enzyme concentration must exceed the substrate concentration. C) Enzymes decrease the activation energy for conversion of substrate to product. D) Enzymes increase the rate of a reaction by adding energy to the substrates. E) Enzymes may be made of protein or RNA. An enzyme catalyzes the conversion of substrate [S] to product [P] at pH 6. The ΔG for the reaction is +3.0 kJ/mole. Which of the following statements are true? A) The enzyme will convert all of the substrate to product. B) The enzyme will not convert any of the substrate to product. C) The enzyme will convert substrate to product, but only until [S] = [P] D) When the reaction reaches equilibrium, [S] will be greater than [P] E) When the reaction reaches equilibrium, [P] will be greater than [S]
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