Biochemistry
9th Edition
ISBN: 9781305961135
Author: Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher: Cengage Learning
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Textbook Question
Chapter 6, Problem 22RE
RECALL Show graphically how the reaction velocity depends on the enzyme concentration. Can a reaction be saturated with enzyme?
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Chapter 6 Solutions
Biochemistry
Ch. 6 - RECALL How does the catalytic effectiveness of...Ch. 6 - RECALL Are all enzymes proteins?Ch. 6 - MATHEMATICAL Catalase breaks down hydrogen...Ch. 6 - REFLECT AND APPLY Give two reasons why enzyme...Ch. 6 - RECALL For the reaction of glucose with oxygen to...Ch. 6 - REFLECT AND APPLY Would nature rely on the same...Ch. 6 - REFLECT AND APPLY Suggest a reason why heating a...Ch. 6 - REFLECT AND APPLY A model is proposed to explain...Ch. 6 - REFLECT AND APPLY Does the presence of a catalyst...Ch. 6 - REFLECT AND APPLY What effect does a catalyst have...
Ch. 6 - REFLECT AND APPLY An enzyme catalyzes the...Ch. 6 - REFLECT AND APPLY Can the presence of a catalyst...Ch. 6 - RECALL For the hypothetical reaction 3A+2B2C+3D...Ch. 6 - REFLECT AND APPLY The enzyme lactate dehydrogenase...Ch. 6 - REFLECT AND APPLY Would you use a pH meter to...Ch. 6 - REFLECT AND APPLY Suggest a reason for carrying...Ch. 6 - RECALL Distinguish between the lock-and-key and...Ch. 6 - RECALL Using an energy diagram, show why the...Ch. 6 - REFLECT AND APPLY Other things being equal, what...Ch. 6 - REFLECT AND APPLY Amino acids that are far apart...Ch. 6 - REFLECT AND APPLY If only a few of the amino acid...Ch. 6 - RECALL Show graphically how the reaction velocity...Ch. 6 - RECALL Define steady state, and comment on the...Ch. 6 - RECALL How is the turnover number of an enzyme...Ch. 6 - MATHEMATICAL For an enzyme that displays...Ch. 6 - MATHEMATICAL Determine the values of KM and Vmax...Ch. 6 - MATHEMATICAL The kinetic data in the following...Ch. 6 - MATHEMATICAL The enzyme -methylaspartase catalyzes...Ch. 6 - MATHEMATICAL The hydrolysis of a...Ch. 6 - MATHEMATICAL For the Vmax obtained in Question 26,...Ch. 6 - MATHEMATICAL You do an enzyme kinetic experiment...Ch. 6 - REFLECT AND APPLY The enzyme D-amino acid oxidase...Ch. 6 - REFLECT AND APPLY Why is it useful to plot rate...Ch. 6 - REFLECT AND APPLY Under what conditions can we...Ch. 6 - BIOCHEMICAL CONNECTIONS Why does acetazolamide...Ch. 6 - BIOCHEMICAL CONNECTIONS How did scientists...Ch. 6 - BIOCHEMICAL CONNECTIONS How do the KM values for...Ch. 6 - Prob. 38RECh. 6 - RECALL What are the three most common mechanisms...Ch. 6 - RECALL What is the biggest difference between a...Ch. 6 - RECALL How do scientists determine the KM of a...Ch. 6 - Prob. 42RECh. 6 - Prob. 43RECh. 6 - RECALL Do all enzymes display kinetics that obey...Ch. 6 - RECALL How can you recognize an enzyme that does...Ch. 6 - RECALL If we describe an enzyme like aspartate...Ch. 6 - RECALL How can competitive and pure noncompetitive...Ch. 6 - RECALL Why does a competitive inhibitor not change...Ch. 6 - RECALL Why does a pure noncompetitive inhibitor...Ch. 6 - RECALL Distinguish between the molecular...Ch. 6 - RECALL Can enzyme inhibition be reversed in all...Ch. 6 - RECALL Why is a Lineweaver-Burk plot useful in...Ch. 6 - RECALL Where do lines intersect on a...Ch. 6 - RECALL What is the difference between pure and...Ch. 6 - REFLECT AND APPLY Why can we say that having a...Ch. 6 - REFLECT AND APPLY When we compare the binding of I...Ch. 6 - RECALL Why does the apparent KM decrease in the...Ch. 6 - RECALL What is a suicide substrate? Why are they...Ch. 6 - RECALL If we made a Lineweaver-Burk plot of an...Ch. 6 - Prob. 60RECh. 6 - MATHEMATICAL For the following aspartase reaction...Ch. 6 - REFLECT AND APPLY Is it good (or bad) that enzymes...Ch. 6 - REFLECT AND APPLY Noncompetitive inhibition is a...Ch. 6 - BIOCHEMICAL CONNECTIONS You have been hired by a...Ch. 6 - REFLECT AND APPLY Would you expect an irreversible...Ch. 6 - REFLECT AND APPLY Would you expect the structure...Ch. 6 - Prob. 67RECh. 6 - Prob. 68RE
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- REFLECT AND APPLY Would nature rely on the same enzyme to catalyze a reaction either way (forward or backward) if the DG were 0.8kcalmol1? If it were 5.3kcalmol1?arrow_forwardREFLECT AND APPLY Would you expect an irreversible inhibitor of an enzyme to be bound by covalent or by non-covalent interactions? Why?arrow_forwardRECALL Are all enzymes proteins?arrow_forward
- REFLECT AND APPLY E. coli incorporates deoxyribonucleotides into DNA at a rate of 250 to 1000 bases per second. Using the higher value, translate this into typing speed in words per minute. (Assume five characters per word, using the typing analogy from Question 36.)arrow_forwardREFLECT AND APPLY The enzyme D-amino acid oxidase has a very high turnover number because the D-amino acids are potentially toxic. The KM for the enzyme is in the range of 1 to 2 mM for the aromatic amino acids and in the range of 15 to 20 mM for such amino acids as serine, alanine, and the acidic amino acids. Which of these amino acids are the preferred substrates for the enzyme?arrow_forwardREFLECT AND APPLY You are purifying a protein for the first time. You have solubilized it with homogenization in a blender followed by differential centrifugation. You wish to try ammonium sulfate precipitation as the next step. Knowing nothing beforehand about the amount of ammonium sulfate to add, design an experiment to find the proper concentration (% saturation) of ammonium sulfate to use.arrow_forward
- REFLECT AND APPLY Suggest a reason why heating a solution containing an enzyme markedly decreases its activity. Why is the decrease of activity frequently much less when the solution contains high concentrations of the substrate?arrow_forwardREFLECT AND APPLLY Show that the reaction Glucose2Glycer-aldehyde-3- phosphate is slightly endergonic (G'52.2kJmol1=0.53kcalmol1); that is, it is not too far from equilibrium. Use the data in Table 17.1.arrow_forwardREFLECT AND APPLY Why is it useful to plot rate data for enzymatic reactions as a straight line rather than as a curve?arrow_forward
- RECALL Distinguish between the lock-and-key and induced-fit models for binding of a substrate to an enzyme.arrow_forwardRECALL What is qPCR?arrow_forwardREFLECT AND APPLY Given the typing speed from Question 37, how long must you type, nonstop, at the fidelity shown by E. coli (see Question 36) before an uncorrected error would be permitted?arrow_forward
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