Why does soap water break down membranes that isolate DNA?
explain chemically.
Using what you know about the structure of DNA and chromatin in the nucleus, name one other molecule that must be removed from the precipitated DNA before you have the DNA molecule on its own?
2007-02-07 19:18:26 · 5 answers · asked by jytopy 4 in Science & Mathematics ➔ Biology
so how actually does soap water break the cell membranes down?
can explain in terms of chemical bonds?
2007-02-09 02:53:08 · update #1
In order to break down the lipid membrane you need a detergent, because the bilayer lipids will maintain their structure (polar outside, nonpolar inside layer) in a polar liquid such as water.
DNA in chromatin has histones, a protein that acts as a "spool" that the DNA winds around. Thus you need to remove protein from precipitated DNA as well.
2007-02-08 01:10:57 · answer #1 · answered by floundering penguins 5 · 3⤊ 0⤋
The soap breaks down the cell membrane which contains lipids and proteins by disrupting the polar interactions that keep the cell membrane together and form new complexes with them.
2007-02-11 04:21:47 · answer #2 · answered by pookworth 1 · 1⤊ 0⤋
Because the nucleus menbranes is made of lipoid ( phospholipits ) which is dissolve in soap water . U also have to remove the protein, too.
2007-02-08 08:25:33 · answer #3 · answered by mr_thu_vi 1 · 0⤊ 0⤋
For the first question, I think it has something to do with the sodium in soap.
The second question, it should be histones and the scaffold proteins, I think.
2007-02-08 06:29:59 · answer #4 · answered by sistergalactic 2 · 0⤊ 1⤋
http://www.bbc.co.uk/schools/gcsebitesize/biology/
2007-02-14 07:10:38 · answer #5 · answered by fallinglight 3 · 0⤊ 0⤋