hello to you too,

through? do you mean throw??

no it wont actually. im not sure if i understoood your question properly, but if you have a sample of blood from which you want to collect the dna from you have to go through an accurate process of extracting the dna.
If you look into the process of DNA extraction, its just a part of the filtering process of the dna from other cellular materials and proteins.

does that answer your question?? hope so

🙂

Yep centrifugation is used in many applications in molecular biology. From cell/bacteria wash to separation of molecules of different densities like in the Meselson-Stahl experiment. And also very important, as a good way to be sure that all your reageants are at the bottom of your tube in most molecular biology experiments 😀

So it is hard to answer completely to your rather vague question.

nothing. DNA is not transformed by centrifugation.
Centrifugation is just a way to separate molecule either by their weight or by their density (centrifugation in a density gradient). And DNA is not thrown out because of the bottom of the tube, that hopefully don’t break, keep its content in.