Disaccharides

Question 1

The two monosaccharides
are linked together by acetal
formation

Answer 1

Disaccharides

Question 2

One monosaccharide act as a hemiacetal and other as alcohol and the resulting glycosidic linkage

Answer 2

Disaccharides

Question 3

Dehydration of the hydroxyl of the hemiacetal group of one monosaccharide with the hydroxyl group of another monosaccharide forms the bond, called

Answer 3

glycosidic bond

Question 4

joining the 2 monosaccharide
units

Answer 4

glycosidic bond

Question 5

A chemical reaction where two molecules are joined together with the removal of a water molecule.

Answer 5

Dehydration Synthesis

Question 6

It’s a common process in forming
larger molecules from smaller ones.

Answer 6

Dehydration Synthesis

Question 7

Malt sugar, found in corn syrup, malt, and germinating seeds

Answer 7

Maltose

Question 8

consists of two molecules of glucose joined by α-1,4-glycosidic bond

Answer 8

Maltose

Question 9

in maltose α-1,4-glycosidic bond means that the first sugar is in α-configuration and its C#1 is linked to C#4 of the second sugar component the second sugar may be either an

Answer 9

α- or a β-anomer

Question 10

4 kinds of Disaccharides

Answer 10

Maltose
Cellobiose
Lactose
Sucrose

Question 11

2 kinds of reducing disaccharide

Answer 11

Cellobiose
Lactose

Question 12

one of the major fragments isolated after extensive hydrolysis of cellulose

Answer 12

Cellobiose

Question 13

in cellobiose the 2 glucose units are joined
by a

Answer 13

β-1,4-glycosidic linkage

Question 14

digested easily by humans because we have enzymes that can break α- (1-4) linkages but not β- (1-4) linkages of cellobiose

Answer 14

Maltose

Question 15

Milk sugar

Answer 15

Lactose

Question 16

how many percent of lactose do humans have

Answer 16

7%–8%

Question 17

how many percent of lactose do cow’s milk have

Answer 17

4%–5%

Question 18

consists of β-galactose with a– β-1,4-glycosidic linkage to β- – glucose (or α-glucose)

Answer 18

Lactose

Question 19

a condition in which people lack the enzyme lactase needed to hydrolyze lactose to galactose and glucose

Answer 19

Lactose intolerance

Question 20

is unpleasant, but its effects can be avoided by a diet that rigorously excluded milk and milk products

Answer 20

Lactose intolerance

Question 21

it is when lactose is not adequately digested, it undergoes bacterial fermentation in the intestinal tract.

Answer 21

Lactose intolerance

Question 22

This process produces lactic acid and gas, which can result in symptoms such as bloating, cramps, and discomfort, commonly associated with lactose intolerance

Answer 22

Lactose intolerance

Question 23

the genetic disease caused by the absence of the enzymes needed for conversion of galactose to glucose.

Answer 23

Galactosemia

Question 24

A reduced form of galactose,
called

Answer 24

dulcitol (galactitol)

Question 25

a toxic metabolite, is produced and accumulates

Answer 25

dulcitol (galactitol)

Question 26

Too much lactic acid in the bloodstream causes

Answer 26

lactic acidosis

Question 27

Cramp, nausea, weakness are common symptoms of?

Answer 27

lactic acidosis

Question 28

is fermented by gut bacteria, producing lactic acid, gas (e.g., carbon dioxide, hydrogen, methane), and other metabolites, leading to gastrointestinal discomfort.

Answer 28

Undigested lactose

Question 29

the common table sugar & the most abundant of all disaccharides found in plants.

Answer 29

Sucrose

Question 30

(nonreducing disaccharide)

Answer 30

Sucrose

Question 31

produced commercially from the juice of sugar cane and sugar beets.

Answer 31

Sucrose

Question 32

the α-anomeric carbon 1 of glucose joins the β-anomeric carbon 2 of fructose (α,β-1,2- glycosidic bond)

Answer 32

Sucrose

Question 33

reaction where α-Glucose and β- Fructose combine to form Sucrose and release a water molecule

Answer 33

Dehydration synthesis

Question 34

these are are involved in the glycosidic bond formation, leaving no free aldehyde or ketone

Answer 34

glucose and fructose

Question 35

a disaccharide where it has two different monosaccharide units are present.

Answer 35

Lactose and sucrose

Question 36

4 disaccharides where Hydrolysis produces only monosaccharides.

Answer 36

Maltose, Cellobiose, lactose, sucrose

Question 37

Its glycosidic linkage is a “head-to-head” linkage.

Answer 37

Sucrose

Question 38

It is not a reducing sugar

Answer 38

Sucrose