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The number of nucleosomes present approximately in a typical mammalian cell is

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3.3 x 10³

3.3 x 10⁴

3.3 x 10⁷

3.3 x 10¹⁰

answer is C.

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Detailed Solution

A typical nucleosome contains 200 bp of DNA helix. The total number of base pairs in a diploid mammalian cell is = 6.6 x10⁹ bp. The number of nucleosomes present in the mammalian cell is

Number of nucleosomes = Total number of base pairs /Number of base pairs per nucleosome

= 6.6 x 10⁹/200 = 3.3 x 10⁷ nucleosomes

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