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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
What are amphoteric compounds and Zwitter ions ?

The compounds having both acidic and basic properties are called amphoeteric compounds. e.g. amino acids. They are acidic due to –COOH group and basic due to – NH2 group.
Zwitter ion is a  molecule or ion having separate positively and negatively charged groups. For example amino acid which can have positive NH2 and negative COOH group.

Give the names of two monosaccharide sugars.

Fructose and glucose are two monosaccharides

Name one monosaccharide which provides energy ?


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.

What are major elements of a cell ?

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