The DNA is then precipitated by incorporating isopropanol into the higher-concentration salt Answer. This forces the big genomic DNA molecules away from Alternative, while the smaller RNA fragments stay soluble. The insoluble DNA is then pelleted and separated from salt, isopropanol and RNA fragments via centrifugation. Springer Nature stays neutral https://chanceddbzx.azuria-wiki.com/928599/reagents_in_dna_extraction_an_overview