DIsaccharides Flashcards Preview

Carbohydrates > DIsaccharides > Flashcards

Flashcards in DIsaccharides Deck (23):
1

What are the disaccharides?

Maltose
Isomaltose
Cellobiose
Lactose
Sucrose

2

Disaccharides?

two monosaccharides residues linked by glycosidic bond

anomeric forms- alpha or beta

repeating units of polysaccharides

3

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

4

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

5

2 glucose units linked by alpha 1,6 glycosidic bond

hydrolyzed by oligo-1,6 glycosides or isolates in small intestines

isomaltose

6

hydrolyzed by oligo-1,6 glycosides or isolates in small intestines

isomaltose

7

2 glucose units linked by alpha 1,6 glycosidic bond

isomaltose

8

disacch unit in the branching points of amylopectin, glycogen, and dextran

isomaltose

9

2 glucose residues linked by alpha 1, 4 glycosidic bond

maltose

10

maltose

2 glucose residues linked by alpha 1, 4 glycosidic bond

11

exhibits mutarotation

maltose and lactose

12

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

13

2 glucose residues linked by beta 1,4 glycosidic bond

cellobiose

14

cellobiose

2 glucose residues linked by beta 1,4 glycosidic bond

15

has no digestive enzyme that can hydrolyze the B glycosidic bond

cellobiose

16

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

17

Which is not fermented by baker's yeast? Maltose, Sucrose, or Lactose?

Lactose

18

fermented by baker's yeast?

Maltose and Sucrose

19

made up of D-galactose linked to D-glucose by beta 1,4-glycosidic bond

Lactose

20

Lactose

made up of D-galactose linked to D-glucose by beta 1,4-glycosidic bond

21

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



22

D-glucose and D-fructose

linkage either alpha 1,2 or beta 2,1 glycosidic bond

Sucrose

23

linkage either alpha 1,2 or beta 2,1 glycosidic bond

Sucrose