Biochemistry
9th Edition
ISBN: 9781305961135
Author: Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher: Cengage Learning
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Chapter 2, Problem 55RE
BIOCHEMICAL CONNECTIONS We usually say that a perfect buffer has its pH equal to its
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Biochemistry
Ch. 2 - REFLECT AND APPLY Why is water necessary for life?Ch. 2 - REFLECT AND APPLY Contemplate biochemistry if...Ch. 2 - RECALL What is a van der Waals force?Ch. 2 - RECALL What is an induced dipole?Ch. 2 - RECALL What is a salt bridge?Ch. 2 - RECALL Under what circumstance is a molecule that...Ch. 2 - REFLECT AND APPLY Which would you think would be a...Ch. 2 - RECALL List the three types of van der Waals...Ch. 2 - RECALL A hydrogen bond is a special case of what...Ch. 2 - REFLECT AND APPLY Why do you think that most...
Ch. 2 - RECALL What are some macromolecules that have...Ch. 2 - BIOCHEMICAL CONNECTIONS How are hydrogen bonds...Ch. 2 - REFLECT AND APPLY Rationalize the fact that...Ch. 2 - REFLECT AND APPLY Draw three examples of types of...Ch. 2 - RECALL What are the requirements for molecules to...Ch. 2 - REFLECT AND APPLY Many properties of acetic acid...Ch. 2 - REFLECT AND APPLY How many water molecules could...Ch. 2 - REFLECT AND APPLY Both RNA and DNA have negatively...Ch. 2 - RECALL Identify the conjugate acids and bases in...Ch. 2 - RECALL Identify conjugate acids and bases in the...Ch. 2 - REFLECT AND APPLY Aspirin is an acid with a pKa of...Ch. 2 - RECALL Why does the pH change by one unit if the...Ch. 2 - MATHEMATICAL Calculate the hydrogen ion...Ch. 2 - MATHEMATICAL Calculate the hydrogen ion...Ch. 2 - MATHEMATICAL Calculate the hydroxide ion...Ch. 2 - RECALL Define the following: (a) Acid dissociation...Ch. 2 - REFLECT AND APPLY Look at Figure 2.17. If you did...Ch. 2 - BIOCHEMICAL CONNECTIONS List the criteria used to...Ch. 2 - BIOCHEMICAL CONNECTIONS What is the relationship...Ch. 2 - MATHEMATICAL What is the [CH3COO]/[CH3COOH] ratio...Ch. 2 - MATHEMATICAL What is the [CH3COO]/[CH3COOH] ratio...Ch. 2 - MATHEMATICAL What is the ratio of TRIS/TRIS-H+ in...Ch. 2 - MATHEMATICAL What is the ratio of HEPES/HEPES-H+...Ch. 2 - MATHEMATICAL How would you prepare 1 L of a 0.050...Ch. 2 - MATHEMATICAL The buffer needed for Question 35 can...Ch. 2 - MATHEMATICAL Calculate the pH of a buffer solution...Ch. 2 - MATHEMATICAL Calculate the pH of a buffer solution...Ch. 2 - MATHEMATICAL Calculate the pH of a buffer solution...Ch. 2 - MATHEMATICAL A catalog in the lab has a recipe for...Ch. 2 - MATHEMATICAL If you mix equal volumes of 0.1 M HCl...Ch. 2 - MATHEMATICAL What would be the pH of the solution...Ch. 2 - MATHEMATICAL If you have 100 mL of a 0.10 M TRIS...Ch. 2 - MATHEMATICAL What would be the pH of the solution...Ch. 2 - MATHEMATICAL Show that, for a pure weak acid in...Ch. 2 - MATHEMATICAL What is the ratio of concentrations...Ch. 2 - BIOCHEMICAL CONNECTIONS You need to carry out an...Ch. 2 - Prob. 48RECh. 2 - Prob. 49RECh. 2 - BIOCHEMICAL CONNECTIONS Which of the buffers shown...Ch. 2 - Prob. 51RECh. 2 - REFLECT AND APPLY In Section 2-4, we said that at...Ch. 2 - MATHEMATICAL Define buffering capacity. How do the...Ch. 2 - BIOCHEMICAL CONNECTIONS If you wanted to make a...Ch. 2 - BIOCHEMICAL CONNECTIONS We usually say that a...Ch. 2 - RECALL What quality of zwitterions makes them...Ch. 2 - Prob. 57RECh. 2 - Prob. 58RECh. 2 - Prob. 59RECh. 2 - BIOCHEMICAL CONNECTIONS A frequently recommended...
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REFLECT AND APPLY Why are proteins more effective catalysts than RNA molecules?
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REFLECT AND APPLY In 1828, Wohler was the first person to synthesize an organic compound (urea, from ammonium cyanate). How did this contribute, ultimately, to biochemistry?
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REFLECT AND APPLY Other things being equal, what is a potential disadvantage of an enzyme having a very high affinity for its substrate?
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REFLECT AND APPLY Why is it somewhat misleading to study bio- chemical pathways separately?
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REFLECT AND APPLY A reaction at 23C has G=1kJmol1. Why might this reaction become spontaneous at 37C?
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REFLECT AND APPLY Suggest a reason why inorganic ions, such as K+,Na+,Ca2+,andMg2+, do not cross biological membranes by simple diffusion.
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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?
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REFLECT AND APPLY Consider the reaction Glucose-6-phosphate+H2OGlucose+PiKeq=[glucose][Pi][glucose-6-P] The Keq at pH 8.5 and 38C is 122. Can you determine the rate of the reaction from this information?
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REFLECT AND APPLY In Section 2-4, we said that at the equivalence point of a titration of acetic acid, essentially all the acid has been converted to acetate ion. Why do we not say that all the acetic acid has been converted to acetate ion?
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REFLECT AND APPLY Suggest a reason for carrying out enzymatic reactions in buffer solutions.
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REFLECT 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.
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REFLECT AND APPLY Sulfanilamide and related sulfa drugs were widely used to treat diseases of bacterial origin before penicillin and more advanced drugs were readily available. The inhibitory effect of sulfanilamide on bacterial growth can be reversed by p-aminobenzoate. Suggest a mode of action for sulfanilamide.
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