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A nucleosome in eukaryotic chromatin contains how many base pairs of DNA wrapped around the histone octamer?
A{'text': '146 bp', 'label': 'A'}
B{'text': '200 bp', 'label': 'B'}
C{'text': '300 bp', 'label': 'C'}
D{'text': '1000 bp', 'label': 'D'}
Answer & Solution
Correct answer: B. {'text': '200 bp', 'label': 'B'}
A typical nucleosome contains 200 bp of DNA wound around a histone octamer of two each of H2A, H2B, H3 and H4. Nucleosomes are the repeating unit of chromatin, seen as 'beads-on-string'.
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