The nucleus is one example of one of the most significant organelles in a cell. It is habitually the largest organelle in animal cells, but not always. Nuclei contain the genetic material called DNA responsible for regulating and directing all cell activities, which is an essential organelle because of its chief purpose.
The three organelles that contain certain DNA are the nucleus, mitochondria, and chloroplasts. Organelles are membrane-bound subunits within a cell that various illicit functions. An organelle is a typical term for the small organs or subunits within a cell.
Organelles are essential for a cell's function and embody the many "workers" within the cell with specialized functions. Organelles help us to understand cells and cellular structure. Some organelles include cell wall, nucleus, cytoplasm, ribosomes, vacuole, chloroplasts, cell membrane, chromosomes, and endoplasmic reticulum.