Why is chromosome compaction important?
Chromosome compaction is on the order of several thousand fold, yet these chromosomes have to be unraveled every cell cycle to be replicated accurately and the daughter chromosomes must be topologically unlinked to allow their separation and segregation into the daughter cells.
Why does eukaryotic DNA have to be tightly packed?
Eukaryotic chromosomes contain an enormous length of DNA relative to the size of the nucleus and therefore must be tightly packed in order to be manageable. Chromosomes are made of chromatin, which is a complex of DNA and protein.
What does each eukaryotic chromosome contain?
Each eukaryotic chromosome is composed of DNA coiled and condensed around nuclear proteins called histones.
Why does DNA need to be packed tightly?
DNA is tightly packed up to fit in the nucleus of every cell. As shown in the animation, a DNA molecule wraps around histone proteins to form tight loops called nucleosomes. … Condensing DNA into chromosomes prevents DNA tangling and damage during cell division.
How is DNA packaged in eukaryotes and prokaryotes?
Prokaryotes and eukaryotes package their DNA molecules with protein in structures called chromosomes. A prokaryotic chromosome is circular and resides in a cell region called the nucleoid.