When are cells condensed and when are they decondensed?

Cells condenses at early pro phase and de-condenses at  late anaphase and telophase

Explanation:

When the protein mass and the nuclei acid mass is equal then it gives rise to a DNA- protein complex which is termed as Chromatin. The characters formation which is  the formation of chromosomes is taken care by the help of the chromatin. In the early stage of cell division that is in the propahse, the cell growth occurs that results in the formation of a thread like structure. The process of condensation takes place at this stage and slows down the process.

In early prophase of metazoan mitosis, the homogeneously distributed chromatin of inter phase begins to form visible thread-like structures. The decondensation process occurs at the satge called anaphase and telophase and it results in the re construction of the inter phase structure.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!