Mention three molecular diagnostic technique which help to detect pathogens from suspected patien. Write the advantages of these techniques over conventional methods.

What is the advantage of techniques like PCR and ELISA over conventional methods?

What are advantages of molecules diagnostic over conventional methods?

Explain, with the help of a schematic diagram, the principle and working of a Light Emiting Diode. What criterion is kept in mind while choosing the semiconductor material for such a device ? Write any two advantages of light emiting diode over conventional incandescent lamps.

A certain patient is suspected to be suffering from AIDS. Which diagnostic technique will you recommend for detection?

Suggest any two techniques which can help early detection of bacterial/viral infections much before the symptoms appear in the body.

From the methods (or techniques) of distillation, filtration, fractional distillation, chromatography, crystallisation, select and write down the technique you would use to separate : Unused zinc after the reaction of excess of zinc with dilute sulphuric acid.

From the methods (or techniques) of distillation, filtration, fractional distillation, chromatography, crystallisation, select and write down the technique you would use to separate : Hydrated copper (II) sulphate or blue vitriol from its aqueous solution.

From the methods (or techniques) of distillation, filtration, fractional distillation, chromatography, crystallisation, select and write down the technique you would use to separate : Nitrogen from liquid air.

From the methods (or techniques) of distillation, filtration, fractional distillation, chromatography, crystallisation, select and write down the technique you would use to separate :Constituents of colouring matter in ink.