Question by  butch (58)

How is DNA extracted?

Like when you do a cheek swab.


Answer by  bunnygirl (779)

From any body tissue that contains DNA, enzymes break down the cells' proteins, fats, and other obstructions that are on the tissue. The DNA is then washed several times and get into a pellet form before getting rehydrated using elution buffer into what can be formally used for further experimentation.


Answer by  carbm65 (100)

There are several techniques that can be used to extract DNA. Probably the most common way is either using a lysing agent or heat separating DNA proteins making them available for analysis. Sample is applied to a special plate and electric current drives the proteins to specfic regions for identification.


Answer by  apsaras (408)

The cell sample is first disintegrated to access the DNA by grinding or sonication. Lipids and proteins from the cells are then removed by adding suitable reagents. Finally, the DNA is precipitated using alcohol and recovered by centrifuging.


Answer by  RandomGuy (138)

Basically you need to open the cells and expose the DNA. Remove the lipids with chemicals, exposing raw material. Remove proteins and place in a cold ethanol solution.


Answer by  Adelle (277)

DNA is typed through a process called PCR, or polymerase chain reaction. There are many steps in this process but the ultimate goal is to amplify, make copies, of specific DNA sequences. Though this scientist are able ot tell if two people are related or if samples match.


Answer by  Lordschild (1398)

First the cells collected must be broken open by sonicating or grinding. Then the membrane lipids must be removed. The DNA is then precipitated usually with some type of alcohol.

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