BIOCHEMISTRY (LOOSELEAF) >CUSTOM PKG<
8th Edition
ISBN: 9781305760738
Author: Campbell
Publisher: CENGAGE C
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Chapter 15, Problem 28RE
RECALL How does the difference between NADH and NADPH affect the reactions in which they are involved?
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The preferred substrate is T because the enzyme half-saturates at 7.00 mM for T, but requires 28.0 mM for U, and 112 mM for S.
b
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The rate constant k 2 with substrate S is 9.60×107 sec-1, with substrate T, k 2 = 6.00×104 sec-1, and with substrate U, k 2 = 2.40×106 sec-1.
Calculate the catalytic efficiency with S, T, and U.
Catalytic efficiency with S =
Catalytic efficiency with T =
Catalytic efficiency with U =
Does enzyme A use substrate S, substrate T, or substrate U with greater catalytic efficiency?
Fumerase catalyzes the conversion of fumerate to malate.
fumerate + H2O ⇋ malate
The turnover number, kcat, for fumerase is 8.00×102 sec-1. The Km of this enzyme for fumerate is 5.00×10-3 μmol mL-1.
a
In an experiment using 2.00×10-3 μmol·mL-1, what is Vmax?
Suppose you wanted to make a buffer of exactly pH 7.00 using KH2PO4 and Na2HPO4. If the final solution was 0.18 M in KH2PO4, you would need 0.25 M Na2HPO4. Now assume you wish to make a buffer at the same pH, using the same substances, but want the total phosphate molarity ([HPO42−]+[H2PO−4]) to equal 0.20 M. What concentration of the Na2HPO4 would be required?
Chapter 15 Solutions
BIOCHEMISTRY (LOOSELEAF) >CUSTOM PKG<
Ch. 15 - RECALL Is there a connection between the...Ch. 15 - REFLECT AND APPLY What do the following indicators...Ch. 15 - REFLECT AND APPLY Consider the reaction...Ch. 15 - RECALL What conditions are necessary for the...Ch. 15 - REFLECT AND APPLY Why is it important that energy...Ch. 15 - RECALL Why is it necessary to define a modified...Ch. 15 - RECALL Which of the following statements is (are)...Ch. 15 - RECALL How can you tell if the standard Gibbs free...Ch. 15 - RECALL Can the thermodynamic property G be used to...Ch. 15 - MATHEMATICAL Calculate G for the following values...
Ch. 15 - Prob. 11RECh. 15 - MATHEMATICAL Consider the reaction AB+C, where...Ch. 15 - Prob. 13RECh. 15 - MATHEMATICAL The G for the reaction Citrate ...Ch. 15 - MATHEMATICAL If a reaction can be written AB, and...Ch. 15 - Prob. 16RECh. 15 - Prob. 17RECh. 15 - Prob. 18RECh. 15 - RECALL Organize the following words into two...Ch. 15 - Prob. 20RECh. 15 - REFLECT AND APPLY Would you expect the production...Ch. 15 - Prob. 22RECh. 15 - REFLECT AND APPLY Adult humans synthesize large...Ch. 15 - RECALL Identify the molecules oxidized and reduced...Ch. 15 - RECALL For each of the reactions in Question 24,...Ch. 15 - Prob. 26RECh. 15 - RECALL What is the structural difference between...Ch. 15 - RECALL How does the difference between NADH and...Ch. 15 - RECALL Which coenzyme is a reactant in the...Ch. 15 - Prob. 30RECh. 15 - Prob. 31RECh. 15 - Prob. 32RECh. 15 - REFLECT AND APPLY The following half reactions...Ch. 15 - Prob. 34RECh. 15 - REFLECT AND APPLY There is a reaction in...Ch. 15 - REFLECT AND APPLY There is a reaction in which...Ch. 15 - Prob. 37RECh. 15 - Prob. 38RECh. 15 - Prob. 39RECh. 15 - Prob. 40RECh. 15 - MATHEMATICAL Using the data in Table 15.1,...Ch. 15 - Prob. 42RECh. 15 - Prob. 43RECh. 15 - MATHEMATICAL The standard free-energy change for...Ch. 15 - Prob. 45RECh. 15 - Prob. 46RECh. 15 - Prob. 47RECh. 15 - REFLECT AND APPLY Would you expect an increase or...Ch. 15 - REFLECT AND APPLY Explain and show why...Ch. 15 - Prob. 50RECh. 15 - Prob. 51RECh. 15 - Prob. 52RECh. 15 - Prob. 53RECh. 15 - REFLECT AND APPLY Why are thioesters considered...Ch. 15 - Prob. 55RECh. 15 - REFLECT AND APPLY This is a conjectural question:...
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