Biology - Study Guide
8th Edition
ISBN: 9780321501561
Author: Martha R. Taylor
Publisher: PEARSON EDUCATION (COLLEGE)
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Textbook Question
Chapter 8, Problem 7TYK
One way in which a cell maintains
- a. siphon the products of a reaction of to the next step in a metabolic pathway.
- b. provide a constant supply of enzymes for critical reactions.
- c. use allosteric enzymes that can bind to activators or inhibitors.
- d. use the energy from anabolic pathways to drive catabolic pathways.
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Students have asked these similar questions
________ is a regulatory mechanism in which the end product of a metabolic pathway inhibits an enzyme that catalyzes an early step in the pathway.
a.
Cooperative inhibition
b.
Feedback inhibition
c.
Allosteric inhibition
d.
Non-competitive inhibition
e.
Metabolic inhibition
How could you use the diversity of metabolic pathways that produce the same or similar products to critique this argument?
Rank the steps from first to last.
a. New enzymes cause modification of the pathway in an advantageous way. b. The biochemical pathway is gradually modified. c. A pathway exists and accomplishes some functions. d. An organism with cellular enzymes has mutations that allow new enzymes to arise.
The mechanism in which the end product of a metabolic pathway inhibits an either step in the pathway is known as
A. Reversible inhibition
B. Metabolic inhibition
C. Feedback inhibition
D. Allosteric inhibition
E. Noncoopetative inhibition
Chapter 8 Solutions
Biology - Study Guide
Ch. 8 - Complete the following concept map that summarizes...Ch. 8 - Complete the following table to indicate how the...Ch. 8 - Develop a concept map on free energy and G. The...Ch. 8 - Prob. 4IQCh. 8 - Prob. 5IQCh. 8 - In the following graph of an exergonic reaction...Ch. 8 - In the following diagram of a catalytic cycle,...Ch. 8 - Return to the diagram in Interactive Question 3.7,...Ch. 8 - Both ATP and ADP serve as regulators of enzyme...Ch. 8 - What is the relationship between the concept of...
Ch. 8 - What role do enzymes play in metabolism?Ch. 8 - ________ the totality of an organisms chemical...Ch. 8 - _______ pathways that use energy to synthesize...Ch. 8 - Prob. 3TYKFCh. 8 - _______ the most random form of energyCh. 8 - _______ term for the measure of disorder or...Ch. 8 - Prob. 6TYKFCh. 8 - _______ inhibitors that decrease an enzymes...Ch. 8 - Prob. 8TYKFCh. 8 - Prob. 9TYKFCh. 8 - Prob. 10TYKFCh. 8 - Catabolic and anabolic pathways are often coupled...Ch. 8 - Which statement most closely reflects the first...Ch. 8 - When a cell breaks down glucose, only about 34% of...Ch. 8 - Prob. 4TYKCh. 8 - Prob. 5TYKCh. 8 - Prob. 6TYKCh. 8 - One way in which a cell maintains metabolic...Ch. 8 - Prob. 8TYKCh. 8 - Prob. 9TYKCh. 8 - What is meant by an induced fit? a. The binding of...Ch. 8 - In an experiment, changing the pH from 7 to 6...Ch. 8 - Prob. 12TYKCh. 8 - Penicillin binds to the active site of an enzyme...Ch. 8 - Prob. 14TYKCh. 8 - Prob. 15TYKCh. 8 - Which line in the diagram indicates the G of the...Ch. 8 - Prob. 17TYKCh. 8 - Prob. 18TYKCh. 8 - Prob. 19TYKCh. 8 - Prob. 20TYK
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- Which of the following is not true about enzymes? a. They are consumed by the reactions they catalyze. b. They are usually made of amino acids. c. They lower the activation energy of chemical reactions. d. Each one is specific to the particular substrate(s) to which it binds.arrow_forwardWhich of the following statements is false? Enzymesa) bind to substrates.b) lower the energy of activation.c) convert coenzymes to products.d) speed up biochemical reactions.e) can be named after the kinds of reaction they catalyze.arrow_forwardWhich of the following statements concerning metabolism and metabolic reactions is CORRECT? A. Anabolism and catabolism are two terms with the same meaning B. Some, but not all, metabolic reactions involve catabolism C. Energy is a by-product of all metabolic reactions D. No correct responsearrow_forward
- NAD+ and FAD are examples of a. enzymes. b. high-energy organic molecules that are digested in cellular respiration. c. allosteric inhibitors, which participate in regulating enzymes. d. coenzymes that are required by some enzymes to function.arrow_forwardAn enzyme has the ability to catalyze reactions of several unrelated compounds. The mechanism of how this enzyme operates is best explained by a. the lock-and-key theory b. the induced-fit theory c. the enzyme-substrate complex d. the efficiency of the enzymearrow_forwardThe figure above represents changes in different types of metabolic pathways (y-axis) as energy charge in a cell (x-axis) changes. What is the best description of the types of reactions shown by the green line labeled "A"? a) Catabolic, energy-consuming pathways b) Anabolic, energy-consuming pathways c) Anabolic, energy-producing pathways d) Catabolic, energy-producing pathwaysarrow_forward
- Cells are able to extract energy from glucose during cellular respiration. Which of the following contributes to the release of energy? Answer can be multiple a Creating energy by breaking C-H and C-C bonds. b Breaking high energy bonds to release their energy. c Replacing glucose's high energy bonds with new low energy bonds. d The formation of strong C-O and O-H bonds.arrow_forwardWhich of the following is not true about enzymes?a. They are consumed by the reactions they catalyze.b. They are usually made of amino acids.c. They lower the activation energy of chemical reactions.d. Each one is specific to the particular substrate(s) to which it binds.arrow_forwardIn 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…arrow_forward
- Metabolic pathways can function efficiently without external control, and will not overproduce unnecessary product molecules because: a) Large pH shifts speed up reactions b) Cells release lots of heat to accelerate product formation c) End products of a pathway cause early enzymes to change shape and inactivate d) Active sites become saturated as product concentration risesarrow_forwardWhich of the following are common to all metabolic pathways? a) Citric acid cycle b) Oxidative phosphorylation c) Electron transport chain d) All of the abovearrow_forwarda primary reason that enzymes are necessary to life is that a. the are portenin coded for in DNA b. activation energies of most biological reactions are too high for the reaction to proceed fast enough for a cells requirements c. activation energies of most biological reactions are too low for the reaction to proceed fast enough for a cells requirements d. enzymes are helpful to life, but not necessaryarrow_forward
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