P1. CARBOHYDRATE (PART 2)

Question 1

• two monosaccharides combined by a glycosidic linkage.

Answer 1

Disaccharides

Question 2

• DISACCHARIDE union can take place by fusion of a free aldehyde or ketone group of one with the free aldehyde or ketone group of the other.
• producing a ____ disaccharide.

Answer 2

NON-REDUCING

Question 3

disaccharide with no reducing group present in the resulting compound.

Answer 3

Sucrose

Question 4

Sucrose are composed of?

Answer 4

D-Glucose + Fructose

Question 5

• DISACCHARIDE union also takes place by fusion of the aldehyde or ketone group of one with an alcoholic group of other, so one aldehyde group remains free and exhibits reduction test, etc.
• producing a ____ disaccharide.

Answer 5

REDUCING

Question 6

Reducing Disaccharides are:

Answer 6

Maltose
Lactose

Question 7

Maltose are composed of?

Answer 7

D-Glucose + D-Glucose

Question 8

Lactose are composed of?

Answer 8

D-Galactose + D-Glucose

Question 9

Type of Disaccharide Testing used?

Answer 9

Acid Hydrolysis Test

Question 10

• test for detecting the presence of SUCROSE.
• hydrolysis by ____ is converted into ____ (the reducing monosaccharides) which answer the Benedict’s test.

Answer 10

1. Acid Hydrolysis Test
2. Concentrated Hydrochloric Acid
3. glucose and fructose

Question 11

Reagents used in Acid Hydrolysis Test:

Answer 11

HCl
20% Sodium Carbonate

Question 12

Result of Acid Hydrolysis Test is an ____ solution.

Answer 12

ACIDIC/ACID