Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYMolecular Basis of Inheritance2 Marks
Question
Give Reasons: 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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