DIsaccharides Flashcards
What are the disaccharides?
Maltose Isomaltose Cellobiose Lactose Sucrose
Disaccharides?
two monosaccharides residues linked by glycosidic bond
anomeric forms- alpha or beta
repeating units of polysaccharides
Maltose
repeating disacch unit of starch
2 glucose residues linked by alpha 1, 4 glycosidic bond
glucose glucosidase
beta anomeric form predominates in nature
exhibits mutarotation
reducing sugar
fermented by ordinary bakers yeast
digested by maltose in small intestines
Isomaltose
disacch unit in the branching points of amylopectin, glycogen, and dextran
2 glucose units inked by alpha 1,6 glycosidic bond
hydrolyzed by oligo-1,6 glycosides or isolates in small intestines
2 glucose units linked by alpha 1,6 glycosidic bond
hydrolyzed by oligo-1,6 glycosides or isolates in small intestines
isomaltose
hydrolyzed by oligo-1,6 glycosides or isolates in small intestines
isomaltose
2 glucose units linked by alpha 1,6 glycosidic bond
isomaltose
disacch unit in the branching points of amylopectin, glycogen, and dextran
isomaltose
2 glucose residues linked by alpha 1, 4 glycosidic bond
maltose
maltose
2 glucose residues linked by alpha 1, 4 glycosidic bond
exhibits mutarotation
maltose and lactose
cellobiose
repeating disacch of cellulose
2 glucose residues linked by beta 1,4 glycosidic bond
has no digestive enzyme that can hydrolyze the B glycosidic bond
2 glucose residues linked by beta 1,4 glycosidic bond
cellobiose
cellobiose
2 glucose residues linked by beta 1,4 glycosidic bond
has no digestive enzyme that can hydrolyze the B glycosidic bond
cellobiose
Lactose
made up of D-galactose linked to D-glucose by beta 1,4-glycosidic bond
glucose B-galactoside
reducing sugar
not fermented by baker’s yeast
Which is not fermented by baker’s yeast? Maltose, Sucrose, or Lactose?
Lactose
fermented by baker’s yeast?
Maltose and Sucrose
made up of D-galactose linked to D-glucose by beta 1,4-glycosidic bond
Lactose
Lactose
made up of D-galactose linked to D-glucose by beta 1,4-glycosidic bond
Sucrose
cane sugar
D-glucose and D-fructose
linkage either alpha 1,2 or beta 2,1 glycosidic bond
a fructose-alpha glucoside or a glucose B fructoside
nonreducing sugar
does not exhibit mutarotation
digestion by sucrose will yield equal mixture of glucose and fructose called invert sugar
D-glucose and D-fructose
linkage either alpha 1,2 or beta 2,1 glycosidic bond
Sucrose
linkage either alpha 1,2 or beta 2,1 glycosidic bond
Sucrose
