Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 6, Problem 4MC
Summary Introduction
Introduction:
Coupled reactions include the exergonic and endergonic reactions inside the cell. The exergonic reactions include the examples of those reactions which release energy during the conversion of substrates to products like the breakdown of glucose. Endergonic reactions include the consumption of energy like for example the synthesis of proteins from the amino-acid molecules. These reactions require the energy in the form of
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Coupled reactionsa. are endergonic overall.b. both synthesize and break down ATP.c. are catalyzed by the same enzyme.d. end with reactants that contain more energy than theirproducts.
Endergonic reactions do which of the following? Select all that apply.
A. Are nonspontaneous
B. Consume energy
C. Are spontaneous
D. Release 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.
Chapter 6 Solutions
Biology
Ch. 6.1 - Prob. 1TCCh. 6.1 - Energy Unleashed Much like a cars engine, the...Ch. 6.1 - define energy and work?Ch. 6.1 - define potential energy and kinetic energy and...Ch. 6.1 - State and explain the first and second laws of...Ch. 6.2 - Is glucose breakdown endergonic or exergonic? What...Ch. 6.2 - Prob. 1CSCCh. 6.2 - describe how energy is captured and released by...Ch. 6.2 - explain exergonic and endergonic reactions and...Ch. 6.2 - explain activation energy?
Ch. 6.3 - Prob. 1TCCh. 6.3 - In hope of reducing plastic waste, some towns and...Ch. 6.3 - name and describe two important energy-carrier...Ch. 6.3 - explain coupled reactions?Ch. 6.4 - Can an enzyme catalyst make an endergonic reaction...Ch. 6.4 - You may have seen the almost magical glow of...Ch. 6.4 - explain how catalysts reduce activation energy?Ch. 6.4 - explain how enzymes function as biological...Ch. 6.5 - Health Watch Lack of an Enzyme Leads to Lactose...Ch. 6.5 - describe how cells regulate the rate at which...Ch. 6.5 - explain how poisons, drugs, and environmental...Ch. 6.5 - Prob. 2TCCh. 6 - Which of the following is True? a. Enzymes...Ch. 6 - Prob. 2MCCh. 6 - Prob. 3MCCh. 6 - Prob. 4MCCh. 6 - Prob. 5MCCh. 6 - Prob. 1FIBCh. 6 - Prob. 2FIBCh. 6 - Prob. 3FIBCh. 6 - Prob. 4FIBCh. 6 - Prob. 5FIBCh. 6 - Prob. 6FIBCh. 6 - Prob. 1RQCh. 6 - Prob. 2RQCh. 6 - Prob. 3RQCh. 6 - Prob. 4RQCh. 6 - Prob. 5RQCh. 6 - Prob. 6RQCh. 6 - Prob. 7RQCh. 6 - While vacuuming, you show off by telling a friend...Ch. 6 - Refute the following: According to evolutionary...Ch. 6 - Can a bear use all the energy contained in the...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 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_forwardWhich statement is FALSE? a. For S P, a catalyst shifts the reaction equilibrium to the right. b. After a reaction, the enzyme involved becomes available to catalyze the reaction again. c. A reaction may not occur at a detectable rate even though it has a favorable equilibrium. d. Substrate binds to an enzyme's active site. e. Lowering the temperature of a reaction will lower the reaction rate.arrow_forwardWhich of the followingdescribe superior properties of enzymes (biological catalysts) over traditional chemical catalysts? a. They are mostly and generally operative under mild temperature, pressure, and pH conditions b. They are regulated only by substrate concentration c. They do not effect the reaction equilibrium, but lower the reaction's activation energy d. They are recycled at the end of the reaction Choose all that applyarrow_forward
- Cells use ATP to drive endergonic reactions because a. ATP is the universal catalyst. b. energy released by ATP hydrolysis makes ΔG for coupled reactions more negative. c. energy released by ATP hydrolysis makes ΔG for coupled reactions more positive. d. the conversion of ATP to ADP is also endergonic.arrow_forwardWhat terms would best describe the above coupled reaction?A. it is non-spontaneous and endothermic (because the overall Go is positive)B. it is spontaneous and exothermic (because the overall Go is positive)C. it is non-spontaneous and exothermic (because the overall Go is positive)D. it is spontaneous and exothermic (because the overall Go is negative)E. it is non-spontaneous and endothermic (because the overall Go is negative)arrow_forwardUse the energy graph shown here to define and explain the importance of the following four terms. You must refer to the parts of the graph as examples. Don't forget to define AND explain all four terms. - uncatalyzed catalyzed Reactant Product Course of Reaction A. Activation energy B. Catalysis C. Gibbs free energy D. Exergonic reactions For the toolh Energy Released Energy Suppliedarrow_forward
- Which statements are true and which are false? Modify each false statement so that it reads correctly. a. In a closed system, neither energy nor matter is exchanged with the surroundings. b. State functions are independent of the pathway. c. A process is isothermic if ΔH = 0. d. The sign and magnitude of ΔG give important information about the direction and rate of a reaction. e. At equilibrium, ΔG = ΔG°. f. For two reactions to be coupled, they must have a common intermediate.arrow_forwardEnzymes: A. increase the amount of energy released during a reaction. B. decrease the amount of energy required for a reaction. C. increase the amount of energy required for a reaction. D. decrease the amount of energy released during a reaction.arrow_forwardWhich of the following statements is FALSE? Select one: a. Enzymes lower the amount of energy needed for a reaction. b. Enzymes are chemically unchanged during the actual catalytic process. c. Enzymes speed up the attainment of a reaction equilibrium. d. Enzymes make reactions 103 to 1020 times faster.arrow_forward
- Enzymes are: A. Broken down in reactions that require energy input. B. Not needed forr catabolic reactions. C. Electron carrier molecules. D. Proteins that function as catalysts. E. All of the choices are correct.arrow_forwardAccording to the lock-and-key model of enzyme action,a. reactants must first be heated.b. enzyme shape is not important.c. each enzyme can catalyze many types of reactions.d. reactants must bind to an active site on the enzyme.e. enzymes control only a small number of reactions in the cell.arrow_forwardIn biological systems, ATP functions bya. providing the energy to drive endergonic reactions.b. acting as an enzyme and lowering the activation energy of certainreactions.c. adjusting the pH of solutions to maintain optimal conditions forenzyme activity.d. regulating the speed at which endergonic reactions proceed.e. interacting with enzymes as a cofactor to stimulate chemical reactions.arrow_forward
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