the nucleus is a membrane-bound organelle found in eukaryotic cells. It contains most of the cell's genetic material, organized as multiple linear DNA molecules in complex with proteins called histones. The nucleus is often referred to as the "control center" of the cell because it regulates gene expression and controls the activities of the cell by controlling protein synthesis. The main functions of the nucleus include: Storage of Genetic Information: The nucleus houses the cell's chromosomes, which carry genes made of DNA. Gene Expression Regulation: It regulates the expression of genes by controlling transcription (the process of making mRNA from DNA) and sometimes post-transcriptional modifications. Cell Division: The nucleus plays a crucial role in cell division (mitosis and meiosis), ensuring accurate replication and distribution of genetic material to daughter cells.