Question

Physical and chemical properties of disaccharides

Answer 1

Answer:

1. These are crystalline, water-soluble, sweet to the taste, and

2. They must be digested to monosaccharides before they can be absorbed and used for energy.

3. POLYSACCHARIDES -These are not water soluble and are not crystalline. They form colloidal suspensions instead of solutions

Explanation:

Answer 2

Answer:

1) All disaccharides are soluble in water and give a sweet taste. the sweetness of sucrose is taken as 1.0, the sweetness of other carbohydrates is listed in below.

Comparative sweetness of carbohydrates

degree of sweetness

Monosaccharide

(1) Glucose

0.7

(2) Fructose

1.7

(3) Galactose

0.3

Disaccharide

(4) Sucrose

1.0

(5) Maltose

0.3

(6) Lactose

0.2

(2) All disaccharides cannot pass through the plasma membrane of the cell. Or, there is no carrier enzyme that can carry disaccharides to move across the plasma membrane.

(3) When disaccharides are dissolved in water, they would cause the lowering of water potential of the solution.

(4) Among disaccharides, maltose and lactose are reducing sugars, while sucrose is a non-reducing sugar.

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