Biochemistry 410/411 Textbook - 5th Edition - Custom Texas A&M University
5th Edition
ISBN: 9781119302940
Author: Voet
Publisher: WILEY C
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Chapter 8, Problem 8E
Summary Introduction
To draw: The structure of β-D-fructose-6-phosphate.
Concept introduction:
The process in which a molecule is attached to a phosphoryl group is called as phosphorylation. The intermediates like the hydroxyacids and phosphorylated sugars help in the major functions of the plants.
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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
Question Content Area
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 8 Solutions
Biochemistry 410/411 Textbook - 5th Edition - Custom Texas A&M University
Ch. 8 - Prob. 1ECh. 8 - 2. Are (a) d-glucitol, (b) d-galactitol, and (c)...Ch. 8 - 3. Which of the following pairs of sugars are...Ch. 8 - 4. Which of the following pairs of sugars are...Ch. 8 - 5. Draw the furanose and pyranose forms of...Ch. 8 - 6. Draw a Fischer projection of l-fucose. l-Fucose...Ch. 8 - 7. Some bacteria produce thiosugars, which contain...Ch. 8 - 8. The metabolism of monosaccharides yields...Ch. 8 - 9. The sucrose substitute tagatose (Fig. 8-2) is...Ch. 8 - 10. What type of sugar derivative is rhamnose?
Ch. 8 - 11. Draw the structure of the mannose...Ch. 8 - 12. Identify the monosaccharides and their...Ch. 8 - 13. How many reducing ends are in a molecule of...Ch. 8 - 14. Is amylose or amylopectin more likely to be a...Ch. 8 - Prob. 15ECh. 8 - 16. The core of pectin molecules is a polymer of...Ch. 8 - 17. Calculate the net charge of a...Ch. 8 - Prob. 18ECh. 8 - 19. In certain situations, a glycosyltransferase...Ch. 8 - Prob. 20ECh. 8 - 21. Draw the structure of the O-type...Ch. 8 - 22. During gel electrophoresis, glycoproteins...Ch. 8 - 23. How many different disaccharides of...Ch. 8 - 24. In addition to lactose, how many other...Ch. 8 - 25. (a) Deduce the structure of the disaccharide...Ch. 8 - 26. The artificial sweetener sucralose is a...Ch. 8 - 27. Broun algae produce alginate, a polysaccharide...Ch. 8 - 28. Human milk contains the oligosaccharide...Ch. 8 - 29. Cellulose is treated with methanol, which...Ch. 8 - 30. Glycogen is treated with dimethyl sulfate,...Ch. 8 - 31. Following their synthesis, many proteoglycans...Ch. 8 - 32. The peptidoglycan cell walls of bacteria...Ch. 8 - Prob. 33CQCh. 8 - 34. One demonstration of P.T. Barnum’s maxim that...Ch. 8 - MORE TO EXPLORE Chitosan is a substance produced...
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