Write any two bio

Two diagnostic procedures are –

•Target Amplification Technique

•PCR ( nucleic acid amplification test)

PRINCIPLE OF PCR

•Amplify ( multiply) a specific nucleic acid sequence,exponentially producing billions of copies

OR

Secondary treatment is a process for wastewater( sewage) to separate and achieve the better quality as much as possible

•It removes around 85% of the organic matter in sewage (by using bacteria in it )

•Principal – the trickling filter and the activated charcoal

•This can be done in three ways –

•BIOFILTRATION - this involves sand filters , contact filters , or trickling filters to remove the additional sediment

Trickling filters are the most effective

•AERATION – it involves the mixing water waste with a solution of micro organism

It is a long (aerated for upto 30 hours) and effective process

•OXIDATION PONDS – it involves the natural water bodies such as lagoons

Water waste is passed through this body for a period of time and then retained for 2-3 weeks