Why is DNA located on the nucleus?

Answer 1

Technically, DNA isn't ONLY found in the nucleus, depending on what organism we're talking about. Prokaryotic organisms usually have their DNA in something called the nucleoid, which isn't the same thing. Just as well, many bacteria utilize plasmids, which are small loops of DNA that can actually be moved from bacteria to bacteria.

But if we're talking about eukaryotes, the reason is because the DNA is pretty important. In eukaryotes, there's a TON of it, and if any of it gets damaged, it's going to result in all future daughters cells being defective as well (this is why cancer spreads).

So in order to keep DNA safe, it stays in the nucleus. When the cell needs some information off of the DNA, like to make protein, then the cell will make RNA, which is basically a copy of whatever information is needed. This ensures that the DNA is safe from any dangers outside of the nucleus while the RNA copies do all the work.

Answer 2

Well, it is located IN the nucleus because it needs to be kept "safe" and it doesn't leave. The nucleus shields it and only allows things to go in and out of the nucleus that are supposed to go in and out of the nucleus.

Answer 3

Because the Nucleus is in control of all cell function, the nucleus needs the DNA too know how too function the cell.