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Structure of a Cell - Nucleus - “Brain” of the Cell

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notes

Nucleus:

  • It is called the brain of the cell as it controls all the activities of cells.

  • It contains a double-layered nuclear membrane which has pores which allow the transfer of material in and out of the cell.

  • It contains chromosomes which contain information for the inheritance of features from parents to the next generation in the form of DNA (Deoxyribo Nucleic Acid) molecules.

  • Chromosome is available in the form of chromatin material in non- dividing cell. Whenever the cell is about to divide, the chromatin material gets organised into chromosomes and perform cell division.

  • The nucleus plays a central role in cellular reproduction in unicellular organisms.

  • Prokaryotes have an undefined nuclear region containing only nucleic acids and are called a nucleoid.

description

  • Nuclear Membrane
  • Nucleoli
  • Nucleoplasm
  • Chromatin fibres
  • Experiment: An experiment on amoeba to show that the nucleus is essential for a normal life.
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