Biochemistry: The Molecular Basis of Life
6th Edition
ISBN: 9780190209896
Author: Trudy McKee, James R. McKee
Publisher: Oxford University Press
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Chapter 7, Problem 18RQ
Summary Introduction
To review:
The structure of a disaccharide uni, thich contains D-glucose linked to D-galactosaminethrough alpha 1,4in a polysaccharide.
Introduction:
Glucose and galactose are hexose (containing six carbons) monosaccharides and are epimers (difference in the arrangement of groups at fourthcarbon) of each other. They can join with each other through alpha 1,4 linkage to form a disaccharide. Galactosamine is a hexosamine derived from galactose by the replacement of hydrogen with the
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When a purine or a pyrimidine is linked through a β-N-glycosidic link to C-1 of a pentose, the molecule is called a _____________ .
Question 18
Match the following structural composition with the corresponding polysaccharide
Linear homoglycan of glucose connected by a1-4 linkages
a. agarose
v Branched glycan formed by alternating units of D-galactose and L-galactose
b. amylose
v Linear sulfated chains of alternating B-D-galactopyranose and 3,6-anhydro- a-galactopyranosyl units
c. amylopectin
v Poly-B-Dmannopyranosyluronic acid and/or Poly-a-L-gulopyranosyluronic acid
d. Alginate
v Repeating Poly-D-galacturonic acid residues
e. agaropectin
deacetylated straight-chain amino-polysaccharide polymer linked in a B(1-4) type of linkage
f. Pectin
g. carrageenan
h. chitosan
question 1 : draw an α,α(2, 2) linkage between the two monosaccharides(two fructose ). label the glycosidic linkage. Must be Haworth
question 2 : Draw glycosidic linkage between D-glucose linked to D-altrose with a β(1, 3) glycosidic linkage. label clearly the glycosidic linkage. must be Haworth.
Chapter 7 Solutions
Biochemistry: The Molecular Basis of Life
Ch. 7 - Prob. 1QCh. 7 - Prob. 2QCh. 7 - Prob. 3QCh. 7 - Prob. 4QCh. 7 - Prob. 5QCh. 7 - Prob. 6QCh. 7 - Prob. 7QCh. 7 - Prob. 1RQCh. 7 - Prob. 2RQCh. 7 - Prob. 3RQ
Ch. 7 - Prob. 4RQCh. 7 - Prob. 5RQCh. 7 - Prob. 6RQCh. 7 - Prob. 7RQCh. 7 - Prob. 8RQCh. 7 - Prob. 9RQCh. 7 - Prob. 10RQCh. 7 - Prob. 11RQCh. 7 - Prob. 12RQCh. 7 - Prob. 13RQCh. 7 - Prob. 14RQCh. 7 - Prob. 15RQCh. 7 - Prob. 16RQCh. 7 - Prob. 17RQCh. 7 - Prob. 18RQCh. 7 - Prob. 19RQCh. 7 - Prob. 20RQCh. 7 - Prob. 21RQCh. 7 - Prob. 22RQCh. 7 - Prob. 23RQCh. 7 - Prob. 24RQCh. 7 - Prob. 25RQCh. 7 - Prob. 26RQCh. 7 - Prob. 27RQCh. 7 - Prob. 28FBCh. 7 - Prob. 29FBCh. 7 - Prob. 30FBCh. 7 - Prob. 31FBCh. 7 - Prob. 32FBCh. 7 - Prob. 33FBCh. 7 - Prob. 34FBCh. 7 - Prob. 35FBCh. 7 - Prob. 36FBCh. 7 - Prob. 37FBCh. 7 - Prob. 38SACh. 7 - Prob. 39SACh. 7 - Prob. 40SACh. 7 - Prob. 41SACh. 7 - Prob. 42SACh. 7 - Prob. 43TQCh. 7 - Prob. 44TQCh. 7 - Prob. 45TQCh. 7 - Prob. 46TQCh. 7 - Prob. 47TQCh. 7 - Prob. 48TQCh. 7 - Prob. 49TQCh. 7 - Prob. 50TQCh. 7 - Prob. 51TQCh. 7 - Prob. 52TQCh. 7 - Prob. 53TQCh. 7 - Prob. 54TQCh. 7 - Prob. 55TQCh. 7 - Prob. 56TQCh. 7 - Prob. 57TQCh. 7 - Prob. 58TQCh. 7 - Prob. 59TQCh. 7 - Prob. 60TQCh. 7 - Prob. 61TQCh. 7 - Prob. 62TQCh. 7 - Prob. 63TQCh. 7 - Prob. 64TQCh. 7 - Prob. 65TQCh. 7 - Prob. 66TQCh. 7 - Prob. 67TQCh. 7 - Prob. 68TQCh. 7 - Prob. 69TQCh. 7 - Prob. 70TQ
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- Cellulose and glycogen are both polymers of glucose, but they have very different functions. Select all of the statements below that are true (this is a multi-select question). One important difference between cellulose and glycogen is that the cellulose has a(1→6) branches, which greatly increases the "connectiveness" within the structure. One important difference between cellulose and glycogen is that cellulose is a B(14) linked glucan, while glycogen is an a(1→4) linked glucan. The major cause of the functional difference is that glycogen is stored in the cytosol, whereas cellulose is a component of the cell walls. Cellulose is flexible due to the noncovalent interactions between the B(1-4) linked strands of glucose: the polymer can bend without breaking covalent bonds. Cellulose is more "stretchy" than glycogen, since its structure is held together only by the relatively weak hydrogen bonds.arrow_forward_____________ is a disaccharide in which galactose is linked to glucose by a β-glycosidic linkage.arrow_forwardWhat is the complete name of the following sugar? но он носн он Write out the words alpha and beta. This question is case-sensitive. Capitalize only the configuration designation, D or L, example: beta-D-glucopyranose.arrow_forward
- The cleavage of fructose-1,6-bisphosphate to glyceraldehyde3-phosphate and dihydroxyacetone phosphate is an exampleof an __________________ reactionarrow_forwardMultisubunit proteins in which some or all of the subunitsare identical are referred to as _______________________.arrow_forwardIf thymine nucleotides are degraded by the same enzymes as those catabolizing uridine nucleotides, give the structure of the thymine metabolite that corresponds to B-ureidopropionate.arrow_forward
- Question 13 Classify the following polysaccharides Chitin A. Heteroploysaccharide Cellulose B. Homopolysaccharide Peptidoglycan v Glycogen Glycosaminoglycanarrow_forwardWhat is the structural difference between the monosaccharides glucose and galactose?arrow_forward_____________ are stereoisomers of sugars that differ only in the configuration at an acetal or ketal carbon.arrow_forward
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