What is the length of DNA present in a nucleo | vedclass

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Question

(C) nucleosome consists of $DNA$ wrapped around a histone octamer. In a typical nucleosome,the $DNA$ segment consists of approximately $146$ base pair

Vedclass · Accepted Answer

$34$

Vedclass · Answer

(C) nucleosome consists of $DNA$ wrapped around a histone octamer. In a typical nucleosome,the $DNA$ segment consists of approximately $146$ base pairs. Since the distance between two adjacent base pairs in a $B-DNA$ helix is $0.34 \, nm$ $(3.4 \, \mathring{A})$,the total length of the $DNA$ can be calculated as: Length $= 146 	imes 0.34 \, nm \approx 49.64 \, nm$. However,considering the linker $DNA$ and the complete structure,the standard value often cited in textbooks for the core $DNA$ length is approximately $146$ base pairs,which corresponds to roughly $50 \, nm$. Among the given options,$17 \, nm$ is incorrect,$3.4 \, nm$ is the length of one turn ($10$ base pairs),and $34 \, nm$ is a common approximation used in some contexts for the total length of the $DNA$ associated with the nucleosome core and linker. Given the standard curriculum,$34 \, nm$ is the most appropriate choice among the provided options.

What is the length of $DNA$ present in a nucleosome (in $, nm$)?

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