Concept explainers
Interpretation:
Whether the
Concept introduction:
Enantiomers are the compounds that are non-superimposable mirror images of each other.
Haworth projection is used to represent sugars in their cyclic forms.
In Haworth projection,
Lactose is a disaccharide made up of a galactose molecule attached to glucose by
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Fundamentals of General, Organic, and Biological Chemistry (8th Edition)
- Considering 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_forwardb-Galactosidase is an enzyme that hydrolyses only b(1,4)linkages of lactose. An unknown trisaccharide is convertedby b-galactosidase into maltose and galactose. Draw thestructure of the trisaccharidearrow_forwardWhat sugar is produced by the epimerization of galactose?arrow_forward
- What are some possible explanations for the branched structure of glycogen?arrow_forwardIn total, including lactose, how many heterodisaccharides of D-galactose and O-glucose are possible?arrow_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_forward
- Explain why each of the following are reducing sugars: mannose, glucopyranose, fructofuranose, and maltose.arrow_forwardWhich of an alpha-D-2,3-di-O-methylglucopyranose or alpha-D-2,3, 6-tri-O-methylglucopyranose represents a glucose unit in glycogen which was originally carrying an (alpha 1-->6) glycosidic bond?arrow_forwardWhat is the structural difference between the monosaccharides glucose and galactose?arrow_forward
- Gentiobiose (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_forwardIn glycoproteins, what are the 3 amino acids to which the carbohydrate groups are most frequently linked and why is that?arrow_forwardConsider the Haworth projections of f-L-galactose and B-L-glucose shown here. ОН CH OH ОН ОН B-L-galactose enantiomers anomers OH diastereomers epimers ОН CH₂OH OH Which terms describe the relationship between these two sugars? ОН OH B-L-glucosearrow_forward
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