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The basic repeating unit of chromatin is the

  • A.centromere
  • B.telomere
  • C.ribosome
  • D.nucleosome

Answer: D

About 147 base pairs of DNA wrap nearly twice around a core of eight histone proteins. Strung together these give the beads-on-a-string appearance seen when chromatin is spread out. Further coiling of that fibre produces the more compact forms.

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