FUNDAMENTALS OF BIOCHEMISTRY WPNG 1-SEME
5th Edition
ISBN: 9781119750192
Author: Voet
Publisher: WILEY
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Chapter 9, Problem 24CQ
Summary Introduction
To explain: How it is possible for the steroid hormones to exert their effects by binding to the cytosolic receptors.
Concept introduction: Hormones are included in the signaling molecules which are produced by glands present in the multicellular organisms. They are transported to target distant organs by the circulatory system. Steroid hormones are the steroids that act as a hormone. It is derived from the cholesterol. They can be mainly classified as corticosteroids and sex steroids.
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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.
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Catalytic efficiency with S =
Catalytic efficiency with T =
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Does enzyme A use substrate S, substrate T, or substrate U with greater catalytic efficiency?
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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?
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Chapter 9 Solutions
FUNDAMENTALS OF BIOCHEMISTRY WPNG 1-SEME
Ch. 9 - Prob. 1ECh. 9 - 2. Which triacylglycerol yields more energy on...Ch. 9 - 3. Draw the structure of a glycerophospholipid...Ch. 9 - 4. Name this lipid.
Ch. 9 - Prob. 5ECh. 9 - 6. What products are obtained when...Ch. 9 - 7. Which of the glycerophospholipid head groups...Ch. 9 - Prob. 8ECh. 9 - 9. Identify the hormone molecule shown here. What...Ch. 9 - 10. Draw the structure of the fatty acid amide...
Ch. 9 - Prob. 11ECh. 9 - Prob. 12ECh. 9 - Prob. 13ECh. 9 - Prob. 14ECh. 9 - Prob. 15ECh. 9 - Prob. 16ECh. 9 - 17. (a) How many turns of an ? helix are required...Ch. 9 - 18. The distance between successive C? atoms in a...Ch. 9 - 19. Are the following lipid samples likely to...Ch. 9 - 20. In order to consume and dispose of dying...Ch. 9 - 21. Sphingosine-1-phosphate can serve as a cell...Ch. 9 - 22. Lipids known as sulfatides occur in cells of...Ch. 9 - 23. In some autoimmune diseases, an individual...Ch. 9 - 24. Most hormones, such as peptide hormones, exert...Ch. 9 - 25. E. coli outer membranes include a component...Ch. 9 - 26. Archaebacteria and Eubacteria produce...Ch. 9 - 27. Shigella bacteria cause severe diarrhea by...Ch. 9 - 28. The inner membranes of mitochondria are rich...Ch. 9 - 29. Describe the labeling pattern of glycophorin....Ch. 9 - 30. Identify a 20-residue segment that could form...Ch. 9 - 31. Macropinocytosis is a variation of endocytosis...Ch. 9 - 32. Explain why the action of phospholipase A2 on...Ch. 9 - 33. Predict the effect of a mutation in signal...Ch. 9 - 34. Explain why a drug that interferes with the...Ch. 9 - 35. The symmetries of oligomeric integral proteins...Ch. 9 - Prob. 36CQCh. 9 - MORE TO EXPLORE Some of the more unusual membrane...
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