NEET Botany Molecular Basis of Inheritance Questions Solved


If length of DNA is 1.36 mm , the number of base pair and nucleosomes in it will be
(A)4×1012 and 2×104
(B)4×106 and 2×1010
(C)4×106 and 2×104
(D) 4×106 and 2×1012

solution-
Length of DNA =No.of base pairs * distance b/w base pairs
1.36mm = X* (.34nm)
X=4*106 bp
No of nucleosome = Total no of bp / bp in one nucleosome
In one nucleosome, 200bp of DNA are present
So, 4*106 bp/200= 2*104 nucleosomes will be present.

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