Question

What is a nucleus in biology?

Answer 1

Nucleus:

1. Robert Brown was the first to describe the nucleus as a cell organelle in 1831.
2. It contains most of the genetic materials of cells.
3. A prokaryotic cell lacks a well-defined nucleus.
4. Eukaryotic cells have a well-organized nucleus.
5. A nucleus has 4 components: nuclear envelope, nucleolus, nucleoplasm, and chromosomes.
6. The nuclear envelope surrounds the nucleus and comprises two lipid bilayers.
7. The nucleolus is a spherical body present in the nucleus.
8. Nucleoplasm is the nuclear matrix that contains chromosomes and nucleoli.