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Question

What is a nucleus in biology?


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Solution

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.

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