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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
Distinguish between reducing and non-reducing sugars.

Reducing Sugars

Non-reducing sugars

(1) Give bright red-precipitate with Fehling’s or Benedict’s solutions.

(2) Have free aldehyde or ketone group which reduces Cu++ to Cu+.

(3) Cannot be hydrolysed.

(4) All monosaccharides and some disaccharides like maltose and lactose are reducing sugars.

(1) Do not give bright red-precipitate with Fehling’s or Benedict’s solutions.

(2) Do not have free aldehyde or ketone group to reduce Cu++ to Cu+.

(3) On hydrolysis give rise to reducing sugars.

(4) Sucrose is non-reducing sugar.

What is the percentage of nucleic acids in cells ?

5 - 7 percent

Give the names of two monosaccharide sugars.

Fructose and glucose are two monosaccharides

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.

Name one monosaccharide which provides energy ?