DNA appeared as a precipitate once ethanol was added after releasing the nucleus from the cells using detergent and grinding it.
2007-03-21 13:45:40 · 3 answers · asked by AAA 1 in Science & Mathematics ➔ Biology
The "stickiness" is a result of the hydrogen bonding. Since glass contains oxygen atoms, there is some interaction between the hydrogen present in the DNA and the oxygen present in the glass.
2007-03-21 13:53:45 · answer #1 · answered by homertorpedo 3 · 0⤊ 0⤋
Because DNA is a (biological) polymer - - a long, chain-like molecule - - it wraps around a glass rod and adheres. A certain number of protein molecules, even nylon or rayon (which are artificial polymers), when coming out of solution will do the same thing.
2007-03-21 13:57:27 · answer #2 · answered by rb43081 5 · 0⤊ 0⤋
since DNA's nitrogenous bases form hydrogen bonds (meaning that they have hydrogen atoms) the hydrogen atoms will also adhere to the glass surface
2007-03-21 14:22:49 · answer #3 · answered by jeffz6 2 · 0⤊ 0⤋