Nucleus:
1. It is a large spherical structure present in the cell.
2. It is bounded by nuclear envelope.
3. It contains chromosomes.
ADVERTISEMENTS:
4. It is rich in DNA, the genetic material.
Nucleolus:
1. It is very small and is present inside the nucleus.
2. It has no limiting membrane.
ADVERTISEMENTS:
3. It does not possess any chromosome, but is organized on one chromosome(Nucleolar organiser).
4. It is rich in RNA.
5. It is involved in ribosome synthesis.