BIOLOGY (LOOSELEAF)-W/CONNECT
12th Edition
ISBN: 9781260692181
Author: Raven
Publisher: MCG
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Textbook Question
Chapter 6, Problem 5A
Enzymes have similar responses to both changes in temperature and pH. The effect of both is on the
a. rate of movement of the substrate molecules.
b. strength of the
c. three-dimensional shape of the enzyme.
d. rate of movement of the enzyme.
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Indicate whether each of the following statements about an enzyme active site is true or false.
a. It is the location where substrate molecules are produced.
b. It always has a fixed, rigid geometry.
c. It always has a geometrical shape exactly complementary to that of substrate.
d. It always accomodates several structurally related substrates.
e. It is the location where substrate molecules are converted to product molecules.
f. It always has a shape that has a degree of flexibility to it.
g. it always accomodates only one specific substrate.
The enzyme activity is:
A. to The number of grams of substrate that react to form product, per mole of enzyme, per unit of time.
b. The number of moles of substrate that react to form product, per gram of enzyme, per unit time.
c. The number of moles of substrate that react to form product, per mole of enzyme, per unit time
d. The number of grams of substrate that react to form product, per gram of enzyme, per unit of time.
Choose only the letter, no explanation needed.
Enzyme activity is affected by a variety of factors. What factor causes the enzyme to denature if it becomes extremely high? *
Choices:
A. Water's Effect
B. pH
C. Temperature
D. Activator's Effect
An inhibitor binds to the enzyme's active site, preventing the substrate from binding to it. What conclusions can you make from this situation? *
A. No reaction occurred
B. Non-competitive inhibition occurred
C. Enzyme activity occurred
D. Competitive inhibition occurred
Each enzyme is very selective when it comes to its substrate. What can you conclude from this statement? *
A. Any substrate can bind to the active site.
B. Enzymes are used up in the reaction.
C. Only a specific substrate can bind to the active site.
D. Enzymes break down when not used.
Lock : Key :: Active Site : _____________________________ *
A. Substrate
B. Active Site
C. Coenzyme
D. Cofactor
Enzymes only speed up biological functions, so they are NOT used up in the…
Chapter 6 Solutions
BIOLOGY (LOOSELEAF)-W/CONNECT
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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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 statements about Competitive and noncompetitive inhibition is false? a. A noncompetitive inhibitor does not change the Km of the enzyme. b. A competitive inhibitor does not change the Vmax of the enzyme c. The noncompetitive inhibitor can bind either free enzyme or the enzyme–substrate complex. d.A competitive inhibitor decreases the apparent Km for a given substrate.arrow_forwardAn allosteric inhibitor does which of the following? a. Binds to an enzyme away from the active site and changes the conformation of the active site, increasing its affinity for substrate binding. b. Binds to the active site and blocks it from binding substrate. c. Binds to an enzyme away from the active site and changes the conformation of the active site, decreasing its affinity for the substrate. d. Binds directly to the active site and mimics the substrate.arrow_forwardWhich of the following is a primary function of the active site of an enzyme? a. It binds allosteric regulators of the enzyme. b. It binds noncompetitive inhibitors of the enzyme. c. It catalyzes the reaction associated with the enzyme. d. It is activated by the presence of the end product of the metabolic pathway in which the enzyme is involved. Clear my choice Question 2 Not yet answered Points out of 2.00 Flag question Question text Which of the following statement about the mass spectrometry is true? a. Large amount of protein sample is needed for mass spectrum, and thus it is very expensive. b. It is a powerful method to determine the 3-dimensional structure of proteins. c. It can be sued for protein location in a living cell. d. It can be used to measure the molecular weight of proteins. e. It can be used to determine the stability of a protein structure in solution. Clear my choice…arrow_forward
- Which 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_forwardThe concept of “induced fit” refers to the fact that: a. enzyme specificity is induced by enzyme-substrate binding. b. enzyme-substrate binding induces an increase in the reaction entropy, thereby catalyzing the reaction. c. enzyme-substrate binding induces movement along the reaction coordinate to the transition state. d. substrate binding may induce a conformational change in the enzyme, which then brings catalytic groups into proper orientation. e. when a substrate binds to an enzyme, the enzyme induces a loss of water (desolvation) from the substrate.arrow_forwardMatch the following terms with the best definition. Enzyme Product Substrate Active Site A. A macromolecule serving as a catalyst. B. A material resulting from a chemical reaction. C. The reactant on which an enzyme works. D. Location on an enzyme where the reaction is catalyzed.arrow_forward
- 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 is not true about enzymes: a. They increase ΔG of reactions. 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_forwardWhen measuring reaction velocity as a function of substrate concentration, a researcher usually keeps the concentration of enzyme at a constant level. What would happen if the enzyme concentration were not kept constant? A. Vmax would change, but Km would remain constant. B. Both Vmax and Km would change C. Vmax would remain constant, but Km would change D. Vmax would remain constant, but V would change E. None of the above would necessarily occurarrow_forward
- In competitive inhibition, increasing concentrations of the inhibitor will have the following effect on the kinetics of the enzyme: A. Km will decrease. B. Vmax will stay the same. C. The reaction will cease because the inhibitor binds irreversibly. D. Km / Vmax will stay the same.arrow_forwardA noncompetitive inhibitor (Circle one). a. Binds at the active site of the enzyme. b. Alters the three-dimensional structure of the enzyme. c. Increases the rate of the enzyme-catalyzed reaction. d. Has a structure similar to the substrate. e. Has its effect reversed by adding more substrate.arrow_forwardWhich of the following is true for the induced-fit model of enzyme-substrate binding? A. The conformation of the enzyme’s active site changes when the enzyme binds to its substrate B. Stronger interactions between the enzyme and its substrate are formed as compared to the lock-and-key model of enzyme-substrate binding C. Both A and B D. Neither A nor B Which statement does not apply to transition states? A. only exist transiently (have lifetimes on the order of 10^-14 to 10^-13 seconds) B. differ in energy from the substrate by the activation energy C. Chemical bonds are in the process of being formed and broken. D. Many have been detected and purified experimentally.arrow_forward
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