Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321775658
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 8, Problem 4TYU
Summary Introduction
Introduction: Enzymes are macromolecules, which acts like the catalysts that increases the reaction without itself undergoing any change or without being consumed. Enzymes are the proteins.
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. If an enzyme in solution is saturated with substrate, the mosteffective way to obtain a faster yield of products is to(A) add more of the enzyme.(B) heat the solution to 90°C.(C) add more substrate.(D) add a noncompetitive inhibitor.
A mixed inhibitor of an enzyme (sometimes called a mixed non-competitive inhibitor) can decrease the rate of a reaction by any of the following EXCEPT by:
a) binding to a site other than the active site of the enzyme.
b) binding to the active site of the enzyme, preventing substrate binding.
c) decreasing kcat.
d) Increasing KM.
A competitive inhibitor diminishes the rate of catalysis:
A) By reducing the proportion of enzyme molecules bound to a substrate.
OB) By altering the shape of the active site of the enzyme
C) By binding to a regulatory subunit
D) By enhancing the interaction between enzyme and reaction product
Chapter 8 Solutions
Campbell Biology (10th Edition)
Ch. 8.1 - MAKE CONNECTIONS How does the second law of...Ch. 8.1 - Describe the forms of energy found in an apple as...Ch. 8.1 - WHAT IF? If you place a teaspoon of sugar in the...Ch. 8.2 - Cellular respiration uses glucose and oxygen,...Ch. 8.2 - VISUAL SKILLS How would the processes of...Ch. 8.2 - WHAT IF? Some nighttime partygoers wear glow-in-...Ch. 8.3 - How does ATP typically transfer energy from an...Ch. 8.3 - Prob. 2CCCh. 8.3 - MAKE CONNECTIONS Does Figure 8.11a show passive...Ch. 8.4 - Many spontaneous reactions occur very slowly. Why...
Ch. 8.4 - Prob. 2CCCh. 8.4 - WHAT IF? Malonate is an inhibitor of the enzyme...Ch. 8.4 - Prob. 4CCCh. 8.5 - How do an activator and an inhibitor have...Ch. 8.5 - Prob. 2CCCh. 8 - Explain how the highly ordered structure of a cell...Ch. 8 - Explain the meaning of each component in the...Ch. 8 - Describe the ATP cycle: How is ATP used and...Ch. 8 - How do both activation energy barriers and enzymes...Ch. 8 - Prob. 8.5CRCh. 8 - Choose the pair of terms that correctly completes...Ch. 8 - Prob. 2TYUCh. 8 - Which of the following metabolic processes can...Ch. 8 - Prob. 4TYUCh. 8 - Some bacteria art metabolically active in hot...Ch. 8 - If an enzyme is added to a solution where its...Ch. 8 - Prob. 7TYUCh. 8 - EVOLUTION CONNECTION Some people argue that...Ch. 8 - Prob. 9TYUCh. 8 - WRITE ABOUT A THEME: ENERGY AND MATTER Life...Ch. 8 - Prob. 11TYU
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- Vmax for an enzyme-catalyzed reaction: A) generally increases when pH increases. B) is limited only by the amount of substrate supplied. C) is twice the rate observed when the concentration of substrate is equal to the Km. D) is unchanged in the presence of a uncompetitive inhibitor. E) increases in the presence of a competitive inhibitor.arrow_forwardVmax for an enzyme-catalyzed reaction: A)is twice the rate observed when the concentration of substrate is equal to Km. B)is unchanged in the presence of a noncompetitive inhibitor. C)generally increases when pH increases. D)increases in the presence of a competitive inhibitor. E)is limited only by the amount of substrate supplied.arrow_forwardMost enzymes have optimum operating conditions to function at maximum rate or velocity. Some of these conditions are the pH temperature the enzyme concentration and the substrate concentration. The optimum pH and temperature values for most enzymes are: a) pH of 1.0 and + 100 oC b) pH of 11.0 and - 7 oC c) pH of 7.0 and + 37 oC d) pH of 14.0 and + 370 oC e) None of the abovearrow_forward
- Indicate i) the class of enzymes to which it belongs to, ii) name the kind of bond that is modified due to its activity, iii) indicate the substrate that is recognised by the enzyme using the amino acid three letter code and iv) whether the enzyme displays high or low substrate specificity. Must be less than 50 words total.arrow_forwardEnzyme specificity us given by :- а) Km b) Vmax c) both d) nonearrow_forwardEnzyme function is often assisted by non-protein helpers or adjuncts, for catalytic activity. A ___ is an organic non-protein adjunct, and a ___ is an inorganic adjunct that may be involved in this function. A) coenzyme; cofactor B) substrate; cofactor C) reactant; substrate D) substrate; reactantarrow_forward
- 14) Which of the following statements is true under the conditions provided: the enzyme concentration is 0.5 nM, substrate concentration is 10 µM, and the KM = 20 µM? a) The enzymatic reaction occurs at maximal velocity. b) The enzymatic reaction occurs between half-maximal and maximal velocity. c) The enzymatic reaction occurs at around half-maximal velocity. d) The enzymatic reaction occurs at between zero and half-maximal velocity. e) Not enough information given to know about the enzymatic reaction rate.arrow_forwarda) How do enzymes catalyze (increase the rate of) reactions? b) What does it mean that enzymes are “substrate specific”? c) How are they usually namearrow_forwardThe activity of an enzyme can be regulated by a: A) competitive inhibitor binding to the active site. B) competitive inhibitor binding to the ES complex. C) noncompetitive inhibitor binding to the ES complex. D) Only A and C are correct. E) Only A and B are correct.arrow_forward
- Based on the kinetic constants below, which enzyme will most efficiently catalyze conversion of the substrate into product? A) Vmax = 10 uM s-1, KM = 10 µM B) Vmax = 10 uM s-1, KM = 0.01 µM C) Vmax = 1000 uM s-1, KM = 500 µM D) Vmax = 1 uM s-1, KM = 1 µM E) Vmax = 200 uM s-1, KM = 10 µMarrow_forwardMULTIPLE CHOICE Compared to an uncatalyzed reaction, an enzyme-catalyzed reaction ________. A) uses less substrate B) produces different products C) occurs at a faster rate D) requires more energy E) requires a higher temperaturearrow_forward2arrow_forward
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Enzyme Kinetics; Author: MIT OpenCourseWare;https://www.youtube.com/watch?v=FXWZr3mscUo;License: Standard Youtube License