What are the main functions of the nucleus?

The main functions of the nucleus include: storage of the cell’s genetic information, DNA replication, gene expression regulation. The nucleus acts as a warehouse that stores the cell’s genetic information. This is an important function because the hereditary information stored is passed on from one generation to the next. The nucleus is also responsible for DNA replication, and ensures that each daughter cell receives a complete set of genetic material during cell division. In gene expression regulation, the nucleus controls the transcription of genes through which involves the synthesis of mRNA molecules from DNA templates. Additionally, various RNA processing events such as splicing and modifications occur in the nucleus before mature RNA molecules are transported to the cytoplasm. The nucleus also provides structural support for the cell, as it separates the nuclear contents from the cytoplasm with the nuclear envelope.