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The Fundamental Unit of Life — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceThe Fundamental Unit of Life1 Mark
MCQ
What is the central role of nucleus?
  • A
    Diffusion.
  • B
    Osmosis.
  • C
    Excretion of toxic materials.
  • D
    Reproduction.
✓

Answer

  1. Reproduction.

Explanation:

A eukaryotic cell has a nucleus, bounded by a double wall membrane structure known as a nuclear membrane. The nuclear membrane is a discontinuous membrane having nuclear pores, which act as a protein channel for regulating the exchange of materials between cytoplasm and nucleoplasm. It regulates the cell in various ways but, the primary function of the nucleus is to contribute in cell division during reproduction by undergoing karyokinesis.

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