Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 6, Problem 3TYK
When two glucose molecules react to form maltose:
a. the reaction represents a negative
b. free energy had to be available to allow the reaction to proceed.
c. the reaction is exothermic.
d. it supports the second law of
e. the resulting product has less potential energy than the reactants.
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Choose the best description of an enzyme: (a) It allows a chemical reaction to proceed extremely fast. (b) It increases the rate at which a chemical reaction approaches equilibrium relative to its uncatalyzed rate. (c) It makes a reaction thermodynamically favorable.
Which of the following is/are true concerning the first law of thermodynamics?
A) Energy cannot be created or destroyed.
B) The total amount of energy in the universe is constant.
C) Energy can be converted from one form to another.
D) It is sometimes referred to as the law of conservation of energy.
E) All of the above are true.
Which of the following statement about the enzyme thermodynamics is TRUE?
a.
Enzymes increase the activation barrier (∆G cat) of the products
b.
Enzymes decrease the activation barrier (∆G cat) of the products
c.
Enzymes decrease the free energy (∆G) of the products
d.
Enzymes decrease the free energy (∆G) of the reactants
e.
Enzymes increase the activation barrier (∆G cat) of the reactants
Chapter 6 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 6.1 - Prob. 1SBCh. 6.1 - In thermodynamics, what is meant by an isolated...Ch. 6.2 - Prob. 1SBCh. 6.2 - Prob. 2SBCh. 6.2 - Distinguish between exergonic and endergonic...Ch. 6.3 - Prob. 1SBCh. 6.3 - How are coupled reactions important to cell...Ch. 6.4 - How do enzymes increase the rates of the reaction...Ch. 6.4 - Can enzymes alter the G of a reaction?Ch. 6.5 - Prob. 1SB
Ch. 6.5 - What is the difference between competitive and...Ch. 6.5 - Prob. 3SBCh. 6.6 - Prob. 1SBCh. 6 - The capacity to do work best defines: a metabolic...Ch. 6 - The assembly of proteins from amino acids is best...Ch. 6 - When two glucose molecules react to form maltose:...Ch. 6 - When glucose reacts with ATP to form...Ch. 6 - In the following graph: A represents the product....Ch. 6 - Which of the following methods is not used by...Ch. 6 - In an enzymatic reaction: a. the enzyme leaves the...Ch. 6 - Which of the following statements about the...Ch. 6 - Which of the following statements about inhibition...Ch. 6 - Which of the following statements is incorrect? a....Ch. 6 - Prob. 11TYKCh. 6 - Discuss Concepts Trace the flow of energy through...Ch. 6 - Prob. 13TYKCh. 6 - Prob. 14TYKCh. 6 - Prob. 15TYKCh. 6 - Prob. 16TYKCh. 6 - Prob. 17TYKCh. 6 - Prob. 1ITDCh. 6 - Prob. 2ITDCh. 6 - Prob. 3ITD
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- Which of the following is true for all exergonic reactions? Group of answer choices A. The reactions are nonspontaneous B. A net input of energy from the surroundings is required for the reactions to proceed C. Some reactants will be converted to products D. The products have more total energy than the reactants E. The reaction proceeds with a net release of free energyarrow_forwardenzymes are efficient catalysts because they can do which of the following? A) catalyze reactions that ottherwise would not occur. B) decrease the free energy of activation of reactions, C) decrease the standard free energy change o reactions , D) prevent the conversion of product to substrate, E) shift the equilibrium of reactions toward more complete inversion of productarrow_forwardWhich of the following statements is/are true about enzyme-catalyzed reactions? A. The reaction is faster than the same reaction. B. The free energy change of the reaction is opposite from the reaction in the absence of the enzymes. C. The reaction always goes in the direction toward chemical equilibrium. D. A and B only E. A, B and Carrow_forward
- If we liken a chemical reaction to an energy hill, then a(n)_______ reaction is, overall, a downhill run. a. exergonic c. catalytic b. endergonic d. both a and carrow_forwardWhich of the following statements is true concerning thermodynamics of reactions within a cell? a) Spontaneous reactions always consume energy b) Unfavorable reactions can be coupled to nonspontaneous reactions c) Compartmentalization can be used to drive up the concentration of substrates to force a reaction to occur d) All important reactions are spontaneousarrow_forwardWhich 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 ratesarrow_forward
- Which of the following statements is false? a. A reaction may not occur at a detectable rate even though it has a favorable equilibrium. b. After a reaction, the enzyme involved becomes available to catalyze the reaction again. c. For S → P, a catalyst shifts the reaction equilibrium to the right. d. Lowering the temperature of a reaction will lower the reaction rate. e. Substrate binds to an enzyme's active site.arrow_forwardA. Will decreasing the amount of energy needed to make an exergonic reaction occur cause the reaction to be more exergonic? Why or why not? B. Will such an energetic alteration change the rate of the reaction? Why or why notarrow_forwardWhy are the laws of thermodynamics considered laws of nature and not scientific theories? a. We have a complete scientific explanation of energy behavior. b. We understand why energy behaves the way it does but not exactly how it behaves. c. We do not understand how or why energy behaves the way it does. d. We understand how energy behaves but not exactly why it behaves the way it does. e. We cannot be absolutely sure that energy will behave the same under all conditions.arrow_forward
- Which of the following statements helps best explain the reaction specificity of an enzyme? a) The shape and charge of the substrates are compatible with the active site of the enzyme. b) The free energy of the reactants is greater than the free energy of the products. c) The equilibrium constant of the reaction is much greater than 1. d) The concentration of the enzyme inside living cells is greater than the concentration of substrate.arrow_forwardSome cool enzyme (CE) catalyzes the conversion of compound F to compound A. Which of the following must be true of CE? a) CE can facilitate conversion of compound A into compound F. b) CE binds more tightly to the substrate F than to the product A. c) CE decreases the energy of the transition state between compounds F and A. d) CE facilitates net conversion of F to A whenever F is present.arrow_forwardWhich 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.arrow_forward
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