Biology
4th Edition
ISBN: 9781259188121
Author: Peter Stiling, Robert Brooker, Linda Graham, Eric Widmaier
Publisher: McGraw-Hill Education
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Chapter 6, Problem 5TY
In biological systems, ATP functions by
- a. providing the energy to drive endergonic reactions.
- b. acting as an enzyme and lowering the activation energy of certain reactions.
- c. adjusting the pH of intracellular solutions to maintain optimal conditions for enzyme activity.
- d. regulating the speed at which endergonic reactions proceed.
- e. interacting with enzymes as a cofactor to stimulate
chemical reactions.
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In 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.
Which 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.
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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…
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.
Chapter 6 Solutions
Biology
Ch. 6.1 - Which do you think has more entropy, a NaCl...Ch. 6.1 - Prob. 2CCCh. 6.2 - Prob. 1CCCh. 6.2 - Prob. 2CCCh. 6.2 - Prob. 3CCCh. 6.2 - Prob. 1BCCh. 6.2 - Prob. 1EQCh. 6.2 - Prob. 2EQCh. 6.2 - Prob. 3EQCh. 6.3 - Prob. 1CC
Ch. 6.3 - Prob. 1BCCh. 6.4 - What are advantages of protein degradation?Ch. 6 - Reactions that release free energy are a....Ch. 6 - Enzymes speed up reactions by a. providing...Ch. 6 - Prob. 3TYCh. 6 - Researchers analyzed a cell extracta mixture of...Ch. 6 - In biological systems, ATP functions by a....Ch. 6 - In a chemical reaction, NADH is converted to NAD+...Ch. 6 - Prob. 7TYCh. 6 - Prob. 8TYCh. 6 - Prob. 9TYCh. 6 - Autophagy provides a way for cells to a. degrade...Ch. 6 - Prob. 1CQCh. 6 - Prob. 2CQCh. 6 - Prob. 3CQCh. 6 - Prob. 1COQCh. 6 - Prob. 2COQ
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- Please help with hw :} ATP is the energy currency of the cell.a. What about the structure of ATP makes it effective at storing free energy? b. Define what is meant by an endergonic or exergonic reaction. c. Explain how ATP can facilitate chemical reactions in the cell, using the terms endergonic and exergonic d. An enzyme is a biological catalyst. Explain what that means in terms of chemical reactions, including a discussion of transition states. e. Do enzymes affect the overall free energy change of a reaction? Explain.arrow_forwardWhich of the following statements concerning ATP is true? a. The free energy value for the hydrolysis of ATP is nearly the same for ADP. b. The free energy value for the hydrolysis of ATP is greater than that for ADP. c. ATP hydrolysis is more likely at pH 5 than at pH 7. d. One mole of glycerate-1,3-bisphosphate can phosphorylate one mole of AMP to yield ATP.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 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.arrow_forwardEnzymes play a fundamental role in cell function. Regarding the biochemistry of enzymes, which of the following statements is correct? A. Enzymes increase the number of molecules that get to the transition state. B. Enzymes increase the rate of a spontaneous reaction by lowering the ΔG. C. Enzymes increase the enthalpy (H) of the products compared to the reactants. D. Most enzymes can bind and react with a wide range of different substrate molecules.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_forward
- 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_forwardIndicate 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.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_forward
- A molecule that is phosphorylated has a. been reduced as a results of a redox reaction involving the loss of an organic phosphate. b. a decreased chemical reactivity; it is less likely to provide energy for cellular work. c. been oxidized a a result of a redox reaction involving the gain of an inorganic phosphate. d. an increased chemical potential energy; it is primed to do cellular work. e. less energy than before its phosphorylation and therefore less energy for cellular work.arrow_forwardWhich one of the following statements is true of enzyme catalysts? a. Their catalytic activity is independent of pH. b. They are generally equally active on D and L isomers of a given substrate. c. They can increase the equilibrium constant for a given reaction by a thousand fold or more. d. They can increase the reaction rate for a given reaction by a thousand fold or more. e. To be effective, they must be present at the same concentration as their substrate.arrow_forwardTransforming sucrose into glucose and galactose is an example of a catabolic process. b. a. an anabolic process. C. energy of motion. d. potential energy. e. kinetic energy- aarrow_forward
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