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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
Distinguish between pyranose and furanose rings.

Pyranose ring

Furanose ring

(1) It is hexagonal.

(2) It has five carbon atoms in the ring and one oxygen atom. e.g. glucose, galactose.

(1) It is pentagonal.

(2) It has four carbon atoms and one oxygen atom in the ring. e.g. fructose.

Name one monosaccharide which provides energy ?


What is the percentage of nucleic acids in cells ?

5 - 7 percent

What are major elements of a cell ?

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

What is the general formula of carbohydrates ?

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

Give the names of two monosaccharide sugars.

Fructose and glucose are two monosaccharides