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Class 10 Class 12
What are quarternary proteins ?

Quarternary proteins. These are made up of two or more than two similar or dissimilar polypeptide chains linked by weak non-covalent bonds e.g. haemoglobin molecule. It consists of two α– and two β– chain forming the primary structure coiled into α– helices forming the secondary structure.
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What are major elements of a cell ?

Carbon, hydrogen, oxygen and nitrogen are the major elements of a cell.
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What is the general formula of carbohydrates ?

The carbohydrate has a general formula - CnH2nOn Or (CH2O)n.
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What is the percentage of nucleic acids in cells ?

5 - 7 percent
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Name one monosaccharide which provides energy ?

Glucose
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Give the names of two monosaccharide sugars.

Fructose and glucose are two monosaccharides
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