LIFE SCIENCE

Detailed explanation-1: -By housing the cell’s genome, the nucleus serves both as the repository of genetic information and as the cell’s control center. DNA replication, transcription, and RNA processing all take place within the nucleus, with only the final stage of gene expression (translation) localized to the cytoplasm.

Detailed explanation-2: -Although the nucleolus has been primarily associated with ribosome biogenesis, several lines of evidence now show that it has additional functions such as regulation of mitosis, cell-cycle progression and proliferation, many forms of stress response, and biogenesis of multiple ribonucleoprotein complexes.

Detailed explanation-3: -Because nucleus contains a material called gene which controls all activities of cell and its characteristics. Cell nuclei contain most of the cell’s genetic material, organized as multiple long linear DNA molecules in complex with histones, to form chromosomes.