Role of extraction buffer in DNA isolation?

Answer 1

TE buffer contains EDTA, which is a strong chelating agent. It chelates the Mg2+ ions present in the solution. Since endonucleases use Mg2+ for their activity, degradation is slowed or checked using this buffer.

This buffer is also maintained at a pH of 8.0 for the same reason. At this pH, the endonucleases show least activity.

All in all, the DNA or RNA sample that we have is safe from getting degraded.

Answer 2

• TEN buffer constitute tris, EDTA and NaCl or(NaOH). Tris helps in maintaining the pH, EDTA is act as a chelating agent, chelates Ca and Mg ions which might harm DNA during isolation of the DNA and NaCl disrupts the cell membrane so that you can get DNA out.

Answer 3

TAE buffer is a buffer solution containing a mixture of acetic acid and EDTA.

In molecular Biology it is used in agarose electrophoresis typically for the separation of nucleic acids such as DNA and RNA. It is made up of tris-acetate buffer, usually at pH 8.0, and EDTA, which sequesters divalent cations. TAE has a lower buffer capacity than TBE buffer and can easily become exhausted, but linear, double stranded DNA runs faster in TAE.

Recently, Brody & Kern simplified electrophoretic buffers by substituting TBE and TAE buffers for a more efficient and inexpensive conductive media in gel systems.

Answer 4

The purpose of TE buffer is to protect DNA or RNA from degradation. It is a buffer for storage of DNA & RNA.

Answer 5

cut the cell and remove the dna in cell

Answer 6

1M Tris-HCl 1ml

0.5M EDTA-0.2ml