ATP is high-energy storage molecule in part because: A. Its hydrolysis results in separation of like charges. B. The hydrolysis reaction has a high activation energy. C. Its ribose is oxidized during the process, which is exergonic. D. It is very soluble.
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ATP is high-energy storage molecule in part because:
A. Its hydrolysis results in separation of like charges.
B. The hydrolysis reaction has a high activation energy.
C. Its ribose is oxidized during the process, which is exergonic.
D. It is very soluble.
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- Which of the following statement regarding enzymes is false? a.) they speed up reaction rates b.) they work within narrow temperature and pH ranges c.) The active site binds the substarate d.) They are consumed in the reactions they catalyzeLactose--->galactose+glucose represents an enzymatic reaction. What statement about this reaction is true? A) lactose is the enzyme of this reacrion B) galactose is the substance of this reaction C) this reaction is a type of exchange reaction D) this reaction is a type of decomposition (catabolic) reactionWhich of the following statements concerning enzymes is TRUE? a. Enzymes can increase the equilibrium constant of a reaction by 1000-fold. b. The activity of many enzymes can be regulated. c. Many enzymes are consumed in the reactions they catalyze. d. The rate of enzymatic catalysis is independent of pH.
- Substance A is converted to substance B in a metabolic reaction. Which statement best describes the role of enzyme during this reaction? A. It dissolves substance A in the reaction medium. B. It speeds up the reaction without it being consumed in the process. C. It provides energy to the reaction system D. It adjusts the pH of the reaction medium.Which of the following is NOT true of enzymes? a) They may interact chemically with their substrates b) They may catalyze a reaction in both forward and reverse directions. c) They may alter Keq for the reaction that they catalyze. d) They may decrease the entropy of their substrates.In a highly high-temperature environment, you placed an enzyme and some substrates. You've seen that there hasn't been any reaction. Applying what you have learned on enzyme activity, how would you explain what occurred? A. The enzyme was not placed at a pH level that would allow it to react at its maximum rate. B. There are not enough enzymes for the reaction to occur. C. The enzyme may have denatured or broken down due to the high temperature of the environment, resulting in no reaction. D. There are not enough substrates for reaction to occur. Substrate concentration affects enzyme activity. Determine what would occur when there are too many substrates and fewer enzymes? A. No enzyme activity would occur. B. The reaction rate would continuously increase. C. The reaction would speed up tremendously. D. Maximal rate of reaction would occur. Enzyme activity mainly involves the active site and the substrate. How would you compare the active site from the substrate? A. The substrate…
- Which of the following is TRUE about the enzymatic catalysis of a chemical reaction? A. It increases the energy of the transition state B. It decreases the free energy ∆G so that a reaction can proceed spontaneously C. It decreases the energy of the transition state D. It increases the forward and reverse ratesYou have a reaction that takes 8 hours to reach completion at 20 degrees celcius. What is the likely result of changing the temperature to 30 degrees celcius? a. the reaction should take less times b. reaction time would be unaffected c. the reaction should take more time Which would be the correct answer to this question?Which is the FALSE sentence about the ATP (Adenosine Triphosphate) in biological system? a) ATP hydrolysis could couple to endergonic reaction to overcome nonspontaneous reaction. b)ATP is high energy molecules that could deliver chemical energy needed in cell. c)ATP hydrolysis requires energy to proceed. d) the hydrolytic cleavage of the terminal phosphoanhydride bond in ATP relieves some of the internal electrostatic repulsion in ATP
- Which of the following accurately describes how an enzyme functions? a. reduces the energy content of the products b. allows for the exothermic reaction of materials that are usually endothermic c. changes the reaction mechanism effectively reducing the activation energy d. shifts the equilibrium for the reactionPREDICT In the following reaction series, which enzyme(s) is/are most likely to have an allosteric site to which the end product E binds? (a) enzyme 1 (b) enzyme 2 (c) enzyme 3 (d) enzyme 4 (e) enzymes 3 and 4As you change the pH from a low pH to a high pH what happens to the rate of an enzymatic reaction, in general terms? A The reaction rate will steadily increase as the pH increases. B The reaction rate will steadily decrease as the pH increases. C The reaction rate will start low, then increase, and then decrease again as the pH increases. D The reaction rate will not change as the pH increases.
