A **nucleosome** consists of:
ADNA wrapped around a histone octamer (H2A, H2B, H3, H4 — two of each)
BEight DNA molecules around one histone
COnly DNA double helix
DHistones without any DNA
Answer & Solution
Correct answer: A. DNA wrapped around a histone octamer (H2A, H2B, H3, H4 — two of each)
A nucleosome = histone octamer (two each of H2A, H2B, H3, H4) with ~146–200 bp of DNA wound 1¾ turns around it. H1 protein binds the entry/exit DNA. Beads-on-a-string organisation of chromatin.
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