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 2Q
Summary Introduction
To review:
The figure of the following compounds:
α- and β-Anomer of D-galactose.
aldonic acid, uronic acid, and aldaric acid derivative of galactose.
Galactitol.
δ- Lactone of galactonicacid.
Introduction:
Carbohydrates are the most abundant
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Indicate whether the following pairs of monosaccharides are aldoses or ketoses. a. D-altrose & D-xylose
b. D-arabinose & D-glyceraldehyde
c. D-erythrulose & D-psicose
d. D-talose & D-gulose
e. dihydroxyacetone & D-tagatose
f. D-idose & D-threose
Classify each of the following sugar pairs as enantiomers, diastereomers, epimers, or an aldose–ketose pair. a. D-erythrose and D-threose b. D-glucose and D-mannose c. D-ribose and L-ribose d. D-allose and D-galactose e. D-glyceraldehyde and dihydroxyacetone
Draw the following sugars using Haworth projections:a. b-d-galactopyranose b. a-d-tagatopyranose c. a-l-glucopyranose
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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- Melibiose is a disaccharide found in artichokes. It consists of galactose and glucose linked by an a(1→6) glycosidic bond. a. Draw the structure of melibiose. b. Is melibiose a reducing sugar? c. Compare the structures of melibiose and lactose.arrow_forwardReferring to the structures in Figures 28.4 and 28.5, classify each pair of compounds as enantiomers, epimers, diastereomers but not epimers, or constitutional isomers of each other. a. D-allose and L-allose d. D-mannose and D-fructose b. D-altrose and D-gulose c. D-galactose and D-talose e. D-fructose and D-sorbose f. L-sorbose and L-tagatosearrow_forwardAlginic acid, isolated from seaweed and used as athickening agent for ice cream and other foods, is apolymer of d-mannuronic acid with b(1,4) glycosidiclinkages.a. Draw the structure of alginic acid.b. Why does this substance act as a thickening agent?arrow_forward
- Draw the structure of each of the following compounds: a. a polysaccharide formed by joining D-glucosamine in 1-→6-a-glycosidic linkages b. a disaccharide formed by joining D-mannose and D-glucose in a 1-4-B-glycosidic linkage using mannose's anomeric carbon c. an a-N-glycoside formed from D-arabinose and CgH;CHNH2 d. a ribonucleoside formed from D-ribose and thyminearrow_forwardDefine the following terms: a. lactone b. aldaric acid c. aldonic acid d. uronic acid e. epimerizationarrow_forwardDraw the L enantiomer in a Fischer projection for each amino acid; identify the amino acid as neutral, acidic, or basic. Give the three-letter sign [3], and the one-letter symbol [4].arginine a. arginine b. arginine c. a. glutamic acid b. glutamic acid c. glutamic acidtyrosine b. valine c. argininearrow_forward
- Show the peptides that would result from cleavage by the indicated reagent: a. Val-Arg-Gly-Met-Arg-Ala-Ser by carboxypeptidase A b. Ser-Phe-Lys-Met-Pro-Ser-Ala-Asp by cyanogen bromide c. Arg-Ser-Pro-Lys-Lys-Ser-Glu-Gly by trypsinarrow_forwardGive an example of each of the following: a. epimer b. acetal linkage c. reducing sugar d. monosaccharide e. anomer f. diastereomerarrow_forwardDraw the following: A. a phosphatidylcholine with two oleic acid as the fatty acids B. a phosphatidylethanolamine with two palmitic acid as the fatty acids C. adenine-thymine base pair (show hydrogen bonds via dashed line) D. guanine-cytosine base pair (show hydrogen bonds via dashed line)arrow_forward
- Draw the formula of each of the following: a. Aspartic acid-histidine-tryptophan b. Glycine-cysteine-tyrosine with the charges that exist in cell fluid.arrow_forwardI.) Draw the following compounds.a.) Maltose: 2 Glucose, α-(1,4)b.) Gentobiose: 2 Glucose, β-(1,6)c.) C-2 epimer of Talosearrow_forwardAnswer the following questions: a. How many possible stereoisomers does D-ribose have? b. What bond is present between the fatty acyl group and the C-2 amino group of sphingosine in a Ceramide?arrow_forward
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