1. Is chromatin just simply a DNA molecule surrounded a protein?
2. when the cell is resting, DNA molecule replicate, is this mean that more chromatin are form and coil to form chromatid and then chromosome, but at that that time, they are still invisible?
- 匿名1 十年前最愛解答
1. Yes, simply as that, but people like to give a special name to it
2. Yes, more chromatin are form, when they form chromosome or chromatid, they are coiled with each other tightly, then you can stain it to observe it ( But it is not invisible, it is just hard to see)
- 1 十年前
Basically DNA will coiled on histone protein.
Before mitosis or meiosis, it further coiled up (supercoiling) so that it is visible under microscope. Just imagine you are coiling a piece of threat again, again and again.
Cell never rest.
DNA replicate at the Synthesis phase of cell cycle. Whether the DNA is visible, depend on how you observe it.