At different times during the life cycle of a cell, the DNA that makes up the cell's chromosomes can be tightly compacted into a structure that is visible under a microscope, or it can be more ...

Cells arrest their cell cycle upon DNA damage through the activation of ... transition is accompanied by a change in the chromatin structure, thereby altering the portion of the genome that ...

Interphase The cell spends most of its life in this phase. The DNA in chromosomes copies itself ready for mitosis. Prophase The DNA in chromosomes and their copies condenses to become more visible.

Earlier that morning, in the nearby Cavendish laboratory, the two scientists had discovered the structure ... human cells contain DNA. The 3 billion pairs of bases in each cell fit into a space ...