BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 6, Problem 4U
A spontaneous reaction is one in which
a. the reactants have a higher free energy than the products.
b. the products have a higher free energy than the reactants.
c. an input of energy is required.
d. entropy is decreased.
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A chemical reaction is more likely to occur spontaneously if
A. the products of the reaction are more complex than the reactants.
B. the system takes up heat from its surroundings.
C. the products of the reaction are more disordered than the reactants.
D. the system gains free energy.
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.
What statements concerning free energy change are true or false? a. Free energy change is a measure of the rate of a reaction. b. Free energy change is a measure of the maximum amount of work available from a reaction. c. Free energy change is a constant for a reaction under any conditions. d. Free energy is related to the equilibrium constant for a specific reaction. e. Free energy change is equal to zero at equilibrium
Chapter 6 Solutions
BIOLOGY
Ch. 6.1 - Prob. 1LOCh. 6.1 - Prob. 2LOCh. 6.1 - Describe the nature of redox reactions.Ch. 6.2 - Explain the laws of thermodynamics.Ch. 6.2 - Prob. 2LOCh. 6.2 - Contrast the course of a reaction with and without...Ch. 6.3 - Describe the role of ATP in short-term energy...Ch. 6.3 - Prob. 2LOCh. 6.4 - Discuss the specificity of enzymes.Ch. 6.4 - Explain how enzymes bind to their substrates.
Ch. 6.4 - Prob. 3LOCh. 6.5 - Prob. 1LOCh. 6.5 - Prob. 2LOCh. 6.5 - Prob. 3LOCh. 6 - Prob. 1DACh. 6 - A covalent bond between two atoms represents what...Ch. 6 - During a redox reaction the molecule that gains an...Ch. 6 - Prob. 3UCh. 6 - A spontaneous reaction is one in which a. the...Ch. 6 - Prob. 5UCh. 6 - Which of the following is NOT a properly of a...Ch. 6 - Where is the energy stored in a molecule of ATP?...Ch. 6 - Prob. 1ACh. 6 - Which of the following statements is NOT true...Ch. 6 - Prob. 3ACh. 6 - Prob. 4ACh. 6 - Enzymes have similar responses to both changes in...Ch. 6 - Prob. 6ACh. 6 - Examine the graph showing the rate of reaction...Ch. 6 - Phosphofructokinase functions to add a phosphate...
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- Which of these statements concerning enzymes is correct?a. Enzymes increase the rate of reactions but are permanentlychanged as a result.b. Enzymes are proteins that function as catalysts.c. Enzymes increase the activation energy requirement for a reactionto occur.d. Enzymes usually can only double the rate of a chemicalreaction.e. Enzymes increase the kinetic energy of the reactants.arrow_forwardWhich of these statements concerning enzymes is correct? a. Enzymes increase the rate of reactions but are permanently changed as a result. b. Enzymes are proteins that function as catalysts. c. Enzymes increase the activation energy requirement for a reaction to occur. d. Enzymes usually can only double the rate of a chemical reaction. e. Enzymes increase the kinetic energy of the reactants.arrow_forwardWhich of the following increases the rate of a reaction? a. cold temperatures b. solid reactants c. increased reactant concentration d. absence of a catalystarrow_forward
- 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_forwardDefine the following terms: a. velocity b. kinetics c. half-life d. first-order reactions e. pseudo-first-order reactionarrow_forwardEnzymes speed up a reaction by: Select one: a. Decreasing the amount of activation energy needed to drive the reaction b. Change the amount of energy of the reactant c. Increasing the amount of activation energy needed to drive the reaction d. Change the amount of energy of the productsarrow_forward
- Which statements concerning free energy change are true?a. Free energy change is a measure of the rate of a reaction.b. Free energy change is a measure of the maximum amountof work available from a reaction.c. Free energy change is a constant for a reaction under anyconditions.d. Free energy change is related to the equilibrium constantfor a specific reaction.e. Free energy change is equal to zero at equilibrium.arrow_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_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
- Which of the following statements are correct about how enzymes accelerate chemical reactions (select all that apply)? A. Enzymes bind substrates to raise their effective concentration B. Enzymes enhance the rate of a chemical reaction C. Enzymes catalyze chemical reactions by destabilizing transition states D. Side chains of protein provide reactive groups that facilitate reaction E. Enzymes shift the equilibrium of a chemical reaction to favor product formationarrow_forwardAll chemical reactions are theoretically reversible. However, many biological reactions are irreversible. Which factor(s) contribute to the irreversibility of biological reactions? a. high energy requirementsb. product removalc. state of chemical equilibriumd. a and be. a, b, and carrow_forwardWhich 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 reactionarrow_forward
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