Biochemistry: Concepts and Connections (2nd Edition)
2nd Edition
ISBN: 9780134641621
Author: Dean R. Appling, Spencer J. Anthony-Cahill, Christopher K. Mathews
Publisher: PEARSON
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Chapter 9, Problem 5P
The disaccharide
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Dextrans are polysaccharides produced by certain species of bacteria.They are glucans, with primarily α(1→ 6) linkages and with frequent α(1 → 3) branching. Draw a Haworth projection of a portion of a dextran,including one (1→ 3) branch point.
Dextrans are polysaccharides produced by certain species of bacteria. They are glucans, with primarily α(1→6) linkages and with frequent α(1→3) branching. Draw a Haworth projection of a portion of a dextran, including one (1→3) branch point.
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Chapter 9 Solutions
Biochemistry: Concepts and Connections (2nd Edition)
Ch. 9 - Prob. 1PCh. 9 - -D-Galactopyranose rotates the plane of polarized...Ch. 9 - Provide an explanation for the fact that a-...Ch. 9 - Why is a type O individual considered a universal...Ch. 9 - The disaccharide , -trehalose differs from the ,...Ch. 9 - A reducing sugar will undergo the Fehling...Ch. 9 - Prob. 7PCh. 9 - Prob. 8PCh. 9 - Indicate whether the structures shown are R and S...Ch. 9 - Prob. 10P
Ch. 9 - Draw (using Haworth projections) the fragments of...Ch. 9 - One or more of the compounds shown below will...Ch. 9 - Why do you suppose that the influenza virus...Ch. 9 - Prob. 14PCh. 9 - Are mannose and galactose epimers? Allose and...Ch. 9 - Prob. 16PCh. 9 - Explain in about one sentence why it is important...Ch. 9 - Prob. 18PCh. 9 - Prob. 19PCh. 9 - Prob. 20PCh. 9 - Prob. 21PCh. 9 - Prob. 22PCh. 9 - Prob. 23P
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- 1) Please list all glycosidic linkages between each monosaccharide units. For example, α(1→4)2) Please discuss whether these oligo/polysaccharides would be reducing or non-reducing sugar. Remember to state your reasoning in complete sentence.arrow_forwardTrehalose, also known as mycose, is a disaccharide found in certain mushrooms. It is composed of two a-D-glucose linked in a aa(1à1) glycosidic bond. Using Haworth projection, draw the structure of trehalose. Indicate whether it is reducing or non-reducing.arrow_forwardGentiobiose (D-Glc(β1→6)D-Glc) is a disaccharide found in some plantglycosides. Draw the structure of gentiobiose based on its abbreviated name. Is it a reducing sugar? Does it undergo mutarotation?arrow_forward
- What structural relationship is indicated by term D-sugar? Why are +glucose and -fructose classified as D-sugarsarrow_forwardRhaminose is a trisaccharide comprised of fructose (B(2→1), fructose (B(2→1) and glucose. Draw the trisaccharide with the hexose in its chair conformations. Indicate the anomeric carbons, the non-reducing end and any other structural details of interest.arrow_forwardDraw the two possible Haworth structures (both alpha and beta anomers) for the following monosaccharides and give their corresponding systematic names. [Show the stepwise process] D-Ribose D-Galactose D- Fructosearrow_forward
- Draw the structure of a disaccharide unit in a polysaccharide composed of d-glucose linked a(1,4) tod-galactosamine.arrow_forwardImagine a trisaccharide that has D-Altrose, D-Gulose, and D-Ribose. D-Altrose is bonded to D-Gulose in an α(1→4) glycosidic bond and D-Ribose is bonded to D-Altrose in an α(1→6) glycosidic bond. Draw the imaginary trisaccharide using Haworth projection with the appropriate representation of each monosaccharide.arrow_forwardDraw a Fischer projection of L-fucose and L-hexose. What are the similarities in their structure?arrow_forward
- Draw both possible disaccharides of D-psicose and D-mannose that are joined by an α(1→4) glycosidic linkage. Are either of them now a reducing sugar?arrow_forwardConsidering the formation of glycosidic linkages between monosaccharides, how many possible trisaccharides can be produced by combining glucose, mannose and galactose? How does this differ from the number of possibilities for a tripeptide composed of three different amino acids?arrow_forwardSuppose a polymer of glucose with alternating α(1-->4) and β(1-->4) glycosidic linkages has just been discovered. Draw a Haworth projection for a repeating tetramer (ie, two repeating dimers) of such a polysaccharide. What organism might use this as a food source?arrow_forward
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