Nucleus in a cell has the following functions -
1. It has genes which stores the hereditary information of an organism.
2. Responsible for protein synthesis, cell division, growth and differentiation.
3. Site for transcription process in which messenger RNA (m RNA) are produced for protein synthesis.
4. Storehouse of all types of genetic material in cells like DNA and RNA.
5. Nucleolus inside the nucleus produces ribosomes required for protein synthesis.
6. Regulates the integrity of genes and gene expression.