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 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.
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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- 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.arrow_forwardSubstance 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.arrow_forwardYou 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?arrow_forward
- Cells carry out anabolic as well as catabolic pathways, with some enzymes functioning in both types of pathways. (a) Explain why these enzymes catalyze near-equilibrium reactions. (b) Explain why opposing anabolic and catabolic pathways must have different enzymes for at least one of the steps.arrow_forwardThe oxidation of NADH is favorable because it involves: a) Separation of like charges. b) Conversion of non-polar to polar bonds. c) Increased resonance. d) Conversion of liquid to gas.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_forward
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- What is an example where molecules or aroma within a cell physically overcome some barrier to their reaction going forward thag is exergonic one? (hint: think about what a catalyst physically does during a reaction).arrow_forwardCells 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_forwardEnzyme A catalyzes the reaction below. Which enzyme in the glycolysis lectures you learned so far catalyzes a similar reaction as enzyme A? Based on the reaction mechanism you learned, draw out the arrow-pushing reaction mechanism including crucial intermediates for the reaction below catalyzed by enzyme A.arrow_forward
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