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Carbohydrates > DIsaccharides > Flashcards

DIsaccharides Flashcards

1
Q

What are the disaccharides?

A 
Maltose
Isomaltose
Cellobiose
Lactose
Sucrose
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2
Q

Disaccharides?

A

two monosaccharides residues linked by glycosidic bond

anomeric forms- alpha or beta

repeating units of polysaccharides

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3
Q

Maltose

A

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

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4
Q

Isomaltose

A

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

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5
Q

2 glucose units linked by alpha 1,6 glycosidic bond

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

A

isomaltose

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6
Q

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

A

isomaltose

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7
Q

2 glucose units linked by alpha 1,6 glycosidic bond

A

isomaltose

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8
Q

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

A

isomaltose

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9
Q

2 glucose residues linked by alpha 1, 4 glycosidic bond

A

maltose

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10
Q

maltose

A

2 glucose residues linked by alpha 1, 4 glycosidic bond

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11
Q

exhibits mutarotation

A

maltose and lactose

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12
Q

cellobiose

A

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

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13
Q

2 glucose residues linked by beta 1,4 glycosidic bond

A

cellobiose

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14
Q

cellobiose

A

2 glucose residues linked by beta 1,4 glycosidic bond

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15
Q

has no digestive enzyme that can hydrolyze the B glycosidic bond

A

cellobiose

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16
Q

Lactose

A

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
Q

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

A

Lactose

18
Q

fermented by baker’s yeast?

A

Maltose and Sucrose

19
Q

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

A

Lactose

20
Q

Lactose

A

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

21
Q

Sucrose

A

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
Q

D-glucose and D-fructose

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

A

Sucrose

23
Q

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

A

Sucrose

Carbohydrates (6 decks)

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