Fundamentals of Biochemistry: Life at the Molecular Level
5th Edition
ISBN: 9781118918401
Author: Donald Voet, Judith G. Voet, Charlotte W. Pratt
Publisher: WILEY
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Chapter 8, Problem 1E
(a)
Summary Introduction
To determine: The number of stereoisomers possible for a ketopentose.
Concept introduction:
Stereoisomers are the pair of compounds which have the same atom and same chemical formula, but differ in the spatial arrangement of their atoms. One of the pairs of stereoisomers is known as epimer.
(a)
Expert Solution
Answer to Problem 1E
Correct answer: The number of stereoisomers possible for a ketopentose is 4.
Explanation of Solution
Explanation:
The formula to calculate the number of stereoisomers in a given carbohydrate is 2n, where n= number of chiral carbons.
The ketopentose contains two chiral atoms. Therefore, the number of stereoisomers will be 22 = 4.
(b)
Summary Introduction
To determine: The number of stereoisomers possible for a ketohexose.
Concept introduction:
Stereoisomers are the pair of compounds which have the same atom and same chemical formula, but differ in the spatial arrangement of their atoms. One of the pairs of stereoisomers is known as an epimer.
(b)
Expert Solution
Answer to Problem 1E
Correct answer: The number of stereoisomers possible for a ketohexose is 8.
Explanation of Solution
Explanation:
The formula to calculate the number of stereoisomers in a given carbohydrate is 2n, where n= number of chiral carbons.
The ketohexose contains three chiral atoms. Therefore, the number of stereoisomers will be 23 = 8.
(c)
Summary Introduction
To determine: The number of stereoisomers possible for a ketoheptose.
Concept introduction:
Stereoisomers refer to the pair of compounds which have the same atom and same chemical formula, but differ in the spatial arrangement of their atoms. One of the pairs of stereoisomers is known as epimer.
(c)
Expert Solution
Answer to Problem 1E
Correct answer: The number of stereoisomers possible for a ketoheptose is 16.
Explanation of Solution
Explanation:
The formula to calculate the number of stereoisomers in a given carbohydrate is 2n, where, n= number of chiral carbons.
The ketoheptose contains four chiral atoms. Therefore, the number of stereoisomers will be 24 = 16.
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Chapter 8 Solutions
Fundamentals of Biochemistry: Life at the Molecular Level
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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