A nucleus is the membrane-enclosed organelle within a cell that contains the chromosomes.
An array of holes, or pores, in the nuclear membrane allows for the selective passage of certain molecules (such as proteins and nucleic acids) into and out of the nucleus.
Importance of nucleus
The eukaryotic cell's crucial membrane-bound component is the nucleus.
By managing the enzymes necessary for cellular processes, the nucleus controls all cellular activity.
It is made up of genes, which are pieces of genetic material found in chromosomes.
Nucleus is called the 'Brain of the cell' as is it the most important because of the following reasons.
It coordinates or directs the cell's activities which include growth, intermediary metabolism, protein synthesis , and reproduction.