What will be the number of histone molecules in a chromatin fibre having 50 nucleosomes?
A
400
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B
450
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C
500
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D
1000
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Solution
The correct option is B 450 The nucleosome is DNA coiled around a core of histones. Histones are of 2 types linker histones and core histones. The core histone has 8 subunits. These are a pair of H2A, H2B, H3 and H4. One linker histone also forms the nucleosome. Hence, the total number of histone will be 9 X 50 = 450.