What is chromatin when it is observed clearly?
Answer: Chromatin is a complex of DNA and protein found in eukaryotic cells. During mitosis and meiosis, chromatin facilitates proper segregation of the chromosomes in anaphase; The characteristic shapes of chromosomes visible during this stage are the result of DNA being coiled into highly condensed chromatin.
Can chromosomes be seen under a microscope?
Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope.
What is chromatin structure?
Chromatin is a complex of macromolecules composed of DNA, RNA, and protein, which is found inside the nucleus of eukaryotic cells. … The primary protein components of chromatin are histones that help to organize DNA into “bead-like” structures called nucleosomes by providing a base on which the DNA can be wrapped around.
How is chromatin structure regulated?
Chromatin accessibility is regulated by nucleosome remodeling, utilization of histone variants, DNA methylation, and posttranslational modifications (PTMs). Chromatin remodeling complexes can slide nucleosomes, rotate the DNA helix relative to the nucleosome to expose TF binding sites, or evict nucleosomes.
Can ribosomes be seen with a light microscope?
Mitochondria are visible with the light microscope but can’t be seen in detail. Ribosomes are only visible with the electron microscope.