The Nucleus

Learn all about the Nucleus

What is it?

The nucleus is a membrane bound structure that contains the cell's hereditary information and controls the cell's growth and reproduction. It is commonly the most important organelle in the cell.The nucleus is surrounded by a structure called the nuclear envelope. This membrane separates the contents of the nucleus from the cytoplasm. The cell's chromosomes are also housed within the nucleus. Chromosomes contain DNA which provides the genetic information necessary for the production of other cell components and for the reproduction of life.

How does it work?

The nucleus regulates all cell activity. It does this by controlling the enzymes present. The Chromatin is composed of DNA. DNA contains the information for the production of proteins. This information is encoded in the four DNA bases. Adenine, Thymine, Cytocine, and Guanine. The specific sequence of these bases tells the cell what order to put the Amino acids.
There are three processes that enable the cell to manufacture protein:
Replication allows the nucleus to make exact copies of its DNA
Transcription allows the cell to make RNA working copies of its DNA
In translation the Messenger RNA is used to line up Amino acids into a protein molecule.