CAMPBELL BIOLOGY IN FOCUS-MOD.MASTERING
3rd Edition
ISBN: 9780135191811
Author: Urry
Publisher: PEARSON
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Chapter 6, Problem 6TYU
If an enzyme is added to a solution where its substrate and product are in equilibrium, what will occur?
- A. Additional product will be formed.
- B. The reaction will change from endergonic to exergonic.
- C. The free energy of the system will change.
- D. Nothing; the reaction will stay at equilibrium.
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Which of the following will happen if the concentration of an enzyme increases for a given substrate??
a. the reaction rate increases similarly
b. the rate of the reaction decreases to a point.
c. there is no change in the reaction.
d. the turnover number decreases at the same rate that the enzyme concentration increases.
e. the reaction stops.
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.
Substance 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.
Chapter 6 Solutions
CAMPBELL BIOLOGY IN FOCUS-MOD.MASTERING
Ch. 6.1 - MAKE CONNECTIONS How does the second law of...Ch. 6.1 - Describe the forms of energy found in an apple as...Ch. 6.2 - Cellular respiration uses glucose and oxygen,...Ch. 6.2 - Prob. 2CCCh. 6.2 - Prob. 3CCCh. 6.3 - How does ATP typically transfer energy from...Ch. 6.3 - Prob. 2CCCh. 6.3 - MAKE CONNECTIONS Does Figure 6.10a show passive or...Ch. 6.4 - Many spontaneous reactions occur very slowly. Why...Ch. 6.4 - Why do enzymes act only on very specific...
Ch. 6.4 - WHAT IF? Malonate is an inhibitor of the enzyme...Ch. 6.4 - A mature lysosome has an internal pH of around...Ch. 6.5 - How do an activator and an inhibitor have...Ch. 6.5 - Prob. 2CCCh. 6 - Choose the pair of terms that correctly completes...Ch. 6 - Prob. 2TYUCh. 6 - Which of the following metabolic processes can...Ch. 6 - If an enzyme in solution is saturated with...Ch. 6 - Some bacteria are metabolically active in hot...Ch. 6 - If an enzyme is added to a solution where its...Ch. 6 - DRAW IT Using a series of arrows, draw the...Ch. 6 - Prob. 8TYUCh. 6 - SCIENCE, TECHNOLOGY, AND SOCIETY Organophosphates...Ch. 6 - FOCUS ON EVOLUTION A recent revival of the...Ch. 6 - FOCUS ON ENERGY AND MATTER Life requires energy....Ch. 6 - SYNTHESIZE YOUR KNOWLEDGE Explain what is...
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- The graph presented here depicts the activation energy, or the amount of energy needed for a reaction to proceed, with and without an enzyme. a. Which reaction requires more energy to proceed—the one with or without an enzyme? How do you know? b. Is this reaction anabolic or catabolic? How do you know?arrow_forwardIf 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_forwardWhich of the followingdescribe superior properties of enzymes (biological catalysts) over traditional chemical catalysts? a. They are mostly and generally operative under mild temperature, pressure, and pH conditions b. They are regulated only by substrate concentration c. They do not effect the reaction equilibrium, but lower the reaction's activation energy d. They are recycled at the end of the reaction Choose all that applyarrow_forward
- Choose in the options what do enzymes do for the activation of energy of the reaction -Ea, given the theory of collision? a. enzymes will bind the reactants b. enzyme will raise temperature to incease the level of energy level. c. enzyme will provide an alternative reaction pathwayarrow_forwardINSTRUCTIONS - Answer the following multiple-choice questions and EXPLAIN in 3-5 sentences why you chose that answer. Answer properly -arrow_forwardWhen an enzyme catalyzes a reaction… A. The pH changes B. Substrate concentration is reduced C. Product concentration is reduced D. Substrate concentration is increasedarrow_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_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_forwardWhen an enzymatic reaction is in progress, do you expect to see happen to the amount of product? A It will increase as the reaction proceeds. B It will decrease as the reaction proceeds. C The amount will not change as reaction proceeds. D It is not possible to predict what will happen to it as the reaction proceeds.arrow_forward
- For reactions to occur there needs to be what level of substrate and enzyme concentrations? Select one: a. Greater amount of substrate b. Lower amount of substrate c. Just the right amount of substratearrow_forwardwhat is the first step in an enzyme-catalyzed reaction? a. formation of enzyme-substrate complex b. ionization of enzyme c. dimerizing the substance d. catalysis of enzymearrow_forwardWhich of the following is TRUE about the enzymatic catalysis of a chemical reaction? A. It increases the energy of the transition state B. It decreases the free energy ∆G so that a reaction can proceed spontaneously C. It decreases the energy of the transition state D. It increases the forward and reverse ratesarrow_forward
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