WHAT IS LIFE LL W/ LAUNCHPAD
4th Edition
ISBN: 9781319231859
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 3, Problem 9MC
Summary Introduction
Introduction:
Proteins are reaction catalysts in the body and can be reused after each reaction cycle.
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Students have asked these similar questions
Which 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.
Which of the following statements are correct about how enzymes accelerate chemical reactions (select all that apply)?
A.
Enzymes bind substrates to raise their effective concentration
B.
Enzymes enhance the rate of a chemical reaction
C.
Enzymes catalyze chemical reactions by destabilizing transition states
D.
Side chains of protein provide reactive groups that facilitate reaction
E.
Enzymes shift the equilibrium of a chemical reaction to favor product formation
Which of the following statements regarding enzymes is true?
A. Enzymes decrease the free energy change of a reaction.
B. Enzymes cjange the direction of chemical reaction.
C. Enzymes prevent changes in substrate concentrations.
D. Enzymes increase the rate of a reaction.
E. Enzymes are permanently altered by the reactions they catalyze.
Chapter 3 Solutions
WHAT IS LIFE LL W/ LAUNCHPAD
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- 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_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_forwardThe following statement can be said about enzymes: A. lowers activation energy of reactions B. regulates chemical activities in the body C. 3D shape is essential for normal function D. all of these E. B and C onlyarrow_forward
- Which of the following statements about enzymes or their function is true? Select one: a. Enzymes are permanently modified during a biochemical reaction. O b. Enzymes act as catalysts. c. Enzymes modify reactions thermodynamic equilibrium. O d. Enzymes increase the activation energy required for a biochemical reaction to occur.arrow_forwardWhich of the following statements is true of all enzymes? A They are soluble in water. B They have a quaternary structure. They have only one active site. D They catalyse anabolic reactions. Carrow_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_forward
- Which of the following statements is not true about enzymes?* A. Enzymes are biological catalysts B. Enzymes as catalysts lowers the activation energy thus, speeds up the rate of reaction C. Enzymes are proteins D. Enzymes are highly specific E. None of the given optionsarrow_forwardWhich 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_forwardWhich of these statements about enzymes is true? a,Most proteins are enzymes. b.Most enzymes are proteins. c.Enzymes are changed by the reactions they catalyze. d.The active sites of enzymes have little specificity for substrates.arrow_forward
- If the environmental temperature gets too high, what will happen to an enzyme and the chemical reaction it catalyzes? Group of answer choices A. It will not encounter its substrates often, and the reaction will slow down. B. It will crystallize, the active site will become inflexible and slow down the reaction. C. It will denature, lose its shape, and the reaction will not occur. D. It will become less fluid, and be unable to transport substances easily. E. It will become more fluid, and speed up the reaction.arrow_forwardEnzymes catalyze a chemical reaction by A. decreasing the amount of ATP required to activate a reaction B. increasing the amount of ATP required to activate a reaction C. slowing down the reaction to obtain more products D. increasing the reaction to obtain more products E. decreasing the amount of ATP required and obtaining more products.arrow_forwardEnzymes speed up a reaction by: Select one: a. Decreasing the amount of activation energy needed to drive the reaction b. Change the amount of energy of the reactant c. Increasing the amount of activation energy needed to drive the reaction d. Change the amount of energy of the productsarrow_forward
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