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4.Principles of Inheritance and Variation
normal
How many nucleosomes are found in helical coil of $30\ nm$ chromatin fibre
A
$10$
B
$12$
C
$6$
D
$9$
Solution
(c) According to Radial loop model. Each chromosome has one or two interconnected scaffolds made of non histone chromosomal proteins.
The scaffold bears a large member of lateral loop all over it. Each lateral loop is $30\ nm$ thick fibre similar to chromatin fibre.
It develops through solenoid coiling of nucleosome chain with about six nucleosomes per turn.
Standard 12
Biology
