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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
What are  polysacharides and state their functions?

Polysaccharides are long chains of sugars containing monosachharides as building blocks. If it is composed of the same monosaccharide it is called a homopolymer like cellulose. Heteropolymers contains different monosaccharide units. For eg starch

Polysaccharides perform various functions -

(1) Source of energy - polysaccharides are broken down to produce energy in the cells. 

(2) Storage - The food is stored in the form of starch in plants and in the form of glycogen in animals.

(3)Structural support -  Cellulose is the structural material of plants.

(4) Protective covering - Exoskeleton of the arthropods are made of polysaccharide chitin. 


Name one monosaccharide which provides energy ?


What are major elements of a cell ?

Carbon, hydrogen, oxygen and nitrogen are the major elements of a cell.

Give the names of two monosaccharide sugars.

Fructose and glucose are two monosaccharides

What is the percentage of nucleic acids in cells ?

5 - 7 percent

What is the general formula of carbohydrates ?

The carbohydrate has a general formula - CnH2nOn Or (CH2O)n.