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Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYMolecular Basis of Inheritance4 Marks
Question
Eukaryotic $ \text{DNA}$ is condensed and supercoiled.
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Answer

  1. In a typical mammalian cell, length of $ \text{DNA}$ double helix is approximately $2.2$ metres.
  2. The size of typical nucleus is approximately $10^{-6} m$
  3. Such a long $ \text{DNA}$ molecule has to be fitted in small nuclear space.
  4. Therefore, $ \text{DNA}$ is highly condensed, coiled and supercoiled so that it can be accommodated in the nucleus.

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