BMS 150 Lecture Notes - Lecture 5: Glycosidic Bond, Triode, Monosaccharide

• School: Ryerson University
• Department: Biomedical Sciences
• Course: BMS 150
• Professor: Vadim Bostan

Document Summary

Sugars and other carbohydrates are highly variable in structure. Monosaccharides: monomers, polymerize (condensation) >> polysaccharides (glycosidic linkages) Aldose: found at the end of the monosaccharide. Ketose: found in the middle of the monosaccharide: number of carbon atoms present. Triode: three; pentose: five; hexose: six: spatial arrangement of their atoms. Different arrangement of the hydroxyl groups: linear and alternative ring forms. Sugars tend to form ring structures in aqueous solutions. * polysaccharides, or complex carbohydrates, are polymers of monosaccharide monomers. * condensation reaction: hydroxyl groups > a covalent bond called a glycosidic linkage. * the two most common glycosidic linkages are: Because glycosidic linkages form between hydroxyl groups, and because every monosaccharide contains at least two hydroxyl groups, the location and geometry of glycosidic linkages can vary widely among polysaccharides. Starch: energy storage in plants (rice, potato, wheat) Angle between c1, c4 causes coiling into helix. !2 i) unbranched: amylose (30%); resistant to breakdown.