Which of the following is not a function of the nucleus?

The nucleus serves several key functions within a cell, and a primary role is storing genetic information in the form of DNA. This DNA not only contains the instructions for the development and function of the organism but also regulates the overall activities of the cell. Additionally, the nucleus is involved in ribosome synthesis; it produces ribosomal RNA (rRNA) and combines it with proteins to form ribosomes, which are essential for protein synthesis.

Energy production, on the other hand, is primarily the role of organelles such as mitochondria. Mitochondria are known as the powerhouses of the cell because they generate adenosine triphosphate (ATP), the energy currency of the cell, through cellular respiration. Thus, the nucleus does not play a role in energy production, making this function distinct from those associated with the nucleus.