Disaccharides

1. Is a diet consisting mainly of rice an adequate diet? Why or why not? 

Ans. Adequate and good quality food is necessary for physical and mental development. This food enter with energy for our daily work. Nutritious food should contain carbohydrates, fats, proteins, and vitamins. Rice alone cannot supply these nutrients. Therefore, a diet mainly of rice is not an adequate diet.

2. What is meant by the inversion of sugar?

The alteration of the especial rotation of sugar from dextrorotatory to laevorotatory is called the inversion of sugar. 

3. Amylose and cellulose are both straight chains polysaccharides containing only D-glucose units. What is the structural difference between the two?

Amylose is a straight-chain polysaccharide having D-glucose units joined together by C-glycoside linkage involving C, of one glucose unit, and C, of the next glucose unit. On the other hand, cellulose is a straight t polysaccharide having D-glucose units joined by B-glycosidic linkages between C, of one glucose unit and C next glucose unit.

4. What is reducing and non-reducing sugars? What is the structural feature characterizing reduce sugars?

Sugars that can degrade Tollen’s reagent or Fehling’s solution are called reducing sugars. The sugars which de reduce Tollen’s reagent or Fehling solution are called non-reducing sugars.  

The distinctive structural affection of reducing sugars in the sight of either-hydroxy aldehyde g (-CHOH-CHO) similar as glucose, mannose, galactose, etc. α-hydroxy keto group (-CO-CH ₂ OH) as present in the fruit.

5. What are the products of Hydrolysis of sucrose?

Glucose and fructose are the products of the Hydrolysis of sucrose.

6. What’s the nomenclature given away to the linkage which holds simultaneously monosaccharide units in polysaccharides?

Glycosidic linkage is the linkage that holds simultaneously monosaccharide units in polysaccharides.  

A disaccharide is two monosaccharides united into one, as one might expect from the di- prefix, which means “two.” A disaccharide is formed when two monosaccharides combine in a chemical process known as dehydration synthesis, which results in the loss of a water molecule. The condensation reaction is another term for this phenomenon. The disaccharide sucrose is created when the monosaccharides fructose and glucose are combined.