Give a brief account of viruses with respect to their structure and nature of genetic material. Also name four common viral diseases.

Name the genetic material of viruses ?

Give a brief account of tissue culture. Also give the advantages of micro propagation.

Write all the acylic structural isomers of C_(4)H_(10)O . Give their IUPAC name also.

A compound X is formed by the reaction of a carboxylic acid C_2H_4O_2 and an alcohol in the presence of a few drops of sulphuric acid. The alcohol on oxidation with alkaline potassium permanganate followed by acidification gives the same carboxylic acid as used in this reaction. Give the names and structures of the a) carboxylic acid b alcohol and c) the compound X. Also write the reaction.

The resistance offered by a wire of unit length and unit cross-sectional area is called resistivity. For a material irrespective of length and area, the resistivity is constant. It is also called specific resistance of the material. Metals and alloys have low resistivity while insulators have high resistivity. Resistivity of two elements A and B are 1.62 xx 10^(-8) Omega m and 520 xx10^(-8) Omega m respectively. Out of these two, name the element that can be used to make : (i) filament of electric bulb. (ii) wires for electrical transmission lines.

Name the acid present in ant sting and give its chemical formula. Also give the common method to get relief from the discomfort caused by the ant sting.

(a) Write the Haworth structure of maltose. ( b ) Give an example for (i) Globular proteins. (ii) naturally occuring optically inactive amino acid. ( c ) Name the nucleic acid which is responsible for genetic information.