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Class 10 Class 12
Enzymes are dependent upon metal ions for their action. Discuss.

Metal ions help in enzyme action by forming coordination bond with the side chains of the active site of the enzyme and one or two coordination bond with the substrate thus increasing the catalytic activity of the enzymes. For example zinc acts as an co-factor for the enzyme carboxy peptidases.Copper is a component of several enzymes .

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 percentage of nucleic acids in cells ?

5 - 7 percent

Name one monosaccharide which provides energy ?

Glucose

What is the general formula of carbohydrates ?

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

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