Question

What is the difference between nucleolus and nucleus?

Answer 1

In cell Biology:
The nucleolus (also called nucleole) is a non-membrane bound structure found within the nucleus in which ribosomal RNA is transcribed, and is composed of protein and nucleic acids.
The nucleus (pl. nuclei; from Latin nucleus or nuculeus, or kernel) is a membrane-enclosed organelle found in all eukaryotic cells. It contains most of the cell's genetic material, organized as multiple long linear DNA molecules in complex with a large variety of proteins, such as histones, to form chromosomes. The genes within these chromosomes are the cell's nuclear genome. The function of the nucleus is to maintain the integrity of these genes and to control the activities of the cell by regulating gene expression.

In Molecules chemistry:
Nucleus is the center of the atoms, which contains protons(+) and neutrons(=).

Answer 2

The nucleolus is found inside the nucleus.